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  • How to achieve "merge" of two data sets with Insert SQL statemen (Oracle DBMS)t?

    - by Roman Kagan
    Hi: What would be the insert SQL statement to merge data from two tables. For example I have events_source_1 table (columns: event_type_id, event_date) and events_source_2 table (same columns) and events_target table (columns: event_type_id, past_event_date nullalbe, future_event_date nullable). Events_source_1 has past events, Events_source_2 has future events and resultant events_target would contain past and future events in the same row for same event_type_id. If there is no past_events but future_events then past_event_date won't be set and only future_event_date will be and the opposite is true too. Thanks a lot in advance for helping me resolving this problem.

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  • ????: PostgreSQL??Oracle RAC????

    - by Kumiko Fujita
    ?????????????????????????????????????????????????????????????????????????? ????????????????????????? * * * ?????????????????????????????????????DBMS??????????????????????????????DBMS????????????????????????????????????????????? 1. ???? ?????????????????????????????????????????????????????????????????????1?????? ???????????????? ?????????????????????????????DB???????OSS?PostgreSQL?????AP?????DB??????????????????? ???????? ?????10?????????????GB????????????????????????????DB?????????????????????????? ?????????????3,500?????????24????????????????????????????????????? ??AP?????????????????????????????????????????DB??PostgreSQL??????????????????PostgreSQL ????????????????????Vacuum????????????????????????????????????????????????????? ??????????????????PostgreSQL?OSS??????????????????????????????????????????????????DB MS??????Oracle Database 11gR2???????????????????????500GB???????????????????????????Partitioning ???????? Oracle Database Enterprise Edition?????????????????????????????????????????????? ????SAN?????Active/Standby???HA????????????????? 2. ????? 2.1. ???? PostgreSQL??????Oracle??????????????????????????????????????????????????????TEXT????? ????????????????????Oracle??????????????????????????PostgreSQL??csv???????Oracle Database?SQL*Loa der????????????? ??????????????????????????????DB??????????????Windows?Liunx??????????????????????? ????????????????????????????????????????????????? ?????????????PostgreSQL?NULL?????''????????????Oracle Database???????????????????????? ?????????? table { border-collapse: collapse; } th { border: solid 1px #666666; color: #000000; background-color: #ff9999; } td { border: solid 1px #666666; color: #000000; background-color: #ffffff; } ???? PostgreSQL Oracle Database ??? CHAR(n) CHAR(n),CLOB VARCHAR(n) VARCHAR2(n),CLOB TEXT CLOB ??? NUMERIC NUMBER INTEGER NUMBER SMALLINT NUMBER BIGINT NUMBER REAL NUMBER DOUBLE PRECISION NUMBER ??? DATE DATE TIMESTAMP TIMESTAMP ????? Bytea BLOB LOB BFILE/SecureFiles ??? OID ROWID 2.2. ????? ?????????????PostgreSQL?Oracle Database??????????SQL???????????????????????????????????Postg reSQL?LIMIT?OFFSET??Oracle Database?????????????????????? LIMIT,OFFSET???SELECT?????? /* PostgreSQL LIMIT,OFFSET */ SELECT ??? FROM ????? ORDER BY ???? LIMIT 2 OFFSET 5; /* Oracle Database????? */ SELECT ??? FROM (SELECT ???, ROWNUM line_no FROM (SELECT??? FROM ????? OREDR BY ???? ) ) WHERE line_no BETWEEN 6 AND 7; ??????????????????????????????????????????????????????????????????????????? ?????????????????? ????????????????????????????????????????????????Oracle Database??????????????????????Oracle Database????WHERE??????????????????????????????????????????????????????WHERE?????????????????????? 3. ???? ???????????????????????30%~40%????????????????????80%????????????????????? ?ITpro???:???????4????? ??????????????????????????????????? ·?????·??????????????????????????? ·????????????????????????????? ????????????????????????????????????????? 3.1. ??????? ????????????????????????????????????????·??????????????????????????????????? ???????????????????????????????????????????????????????·?????????????????? ???????????????????????????? (1)???????????????????? (2)???????????????????????????????????????????? (3)??????????????? (4)???????????????????????????????? ???????????·???????????????????????????????????????????????????????????????? ????????????????????? ????????·?? table { border-collapse: collapse; } th { border: solid 1px #666666; color: #000000; background-color: #ff9999; } td { border: solid 1px #666666; color: #000000; background-color: #ffffff; } ?? ?? ?? (1) ?????????? ????????????·???????????????????????? (2) ???????????????????? ?????????????????????????????? (3) ?????4????????????????? ???????????????????????DB????????? (4) ??????????(3)???????? ???????????????????????? ?????????????????????GB???????????????????????????????????????????(3)?????????? ??????? ??????????????????????????????????????????????csv??????????SQL*Loader?Oracle Database?????????????????????Oracle Database???????????????????????????INSERT????????????? ???????????????????????????????????????????????????????????????????????????? ?????????????????????? 3.2. ????? ???????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 3.3. ????? ??????????????????????????????????????????????????????????????????????????? ??????????????????????? DBMS????????????????????????SQL??????????????????????????????????????????????????PostgreSQL?Oracle Database???????????MVCC?????????????????????????Read Committed??????????????????????????????????????????????????????????????????????????????????? ????????????????DBMS?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 4. ??? PostgreSQL??Oracle Database?????????????????????????????? ????????????·????????????????????????????????????? ??????4???????????????????????·??????????????????? ???????????????????????????????????????????????? ?????????????????????????????????????????????DBMS???????????????????DBMS???????? ?????SQL?????????????????????????????DB???????????????????????????? ???????????????????????????DBMS?????????????????????????????????????????????????????? ??????????????????????????????

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  • Access to Oracle Database with sqlapi C++

    - by Meloun
    Hi, I need to write some data in several database. I choose sqlapi.com I have made it for mysql and mssql. Now I have Problem with Oracle database. I have installed server and client on Ubuntu. In browser it works, but sqlapi says: libnnz10.so: cannot open shared object file: No such file or directory DBMS API Library 'libclntsh.so' loading fails This library is a part of DBMS client installation, not SQLAPI++ Make sure DBMS client is installed and this required library is available for dynamic loading Linux/Unix: 1) The directories in the user's LD_LIBRARY_PATH environment variable 2) The list of libraries cached in /etc/ld.so.cache 3) /usr/lib, followed by /lib There are both of these files depp inside /usr/lib. I have tried a lot of ways to say eclipse path to this folder, but nothing works. Thanks for help.

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  • ASP.NET MVC 2 - user defined database connection.

    - by J Harley
    Hello, I am looking to port my very basic DBMS software from classic ASP to ASP.net - however the user would need to input the connection details in order to connect to their specific DBMS server. Is this at all possible with ASP.NET MVC (very similar to DSN-less connections in ASP). Cheers, Joel

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  • SQL SERVER – Weekly Series – Memory Lane – #035

    - by Pinal Dave
    Here is the list of selected articles of SQLAuthority.com across all these years. Instead of just listing all the articles I have selected a few of my most favorite articles and have listed them here with additional notes below it. Let me know which one of the following is your favorite article from memory lane. 2007 Row Overflow Data Explanation  In SQL Server 2005 one table row can contain more than one varchar(8000) fields. One more thing, the exclusions has exclusions also the limit of each individual column max width of 8000 bytes does not apply to varchar(max), nvarchar(max), varbinary(max), text, image or xml data type columns. Comparison Index Fragmentation, Index De-Fragmentation, Index Rebuild – SQL SERVER 2000 and SQL SERVER 2005 An old but like a gold article. Talks about lots of concepts related to Index and the difference from earlier version to the newer version. I strongly suggest that everyone should read this article just to understand how SQL Server has moved forward with the technology. Improvements in TempDB SQL Server 2005 had come up with quite a lots of improvements and this blog post describes them and explains the same. If you ask me what is my the most favorite article from early career. I must point out to this article as when I wrote this one I personally have learned a lot of new things. Recompile All The Stored Procedure on Specific TableI prefer to recompile all the stored procedure on the table, which has faced mass insert or update. sp_recompiles marks stored procedures to recompile when they execute next time. This blog post explains the same with the help of a script.  2008 SQLAuthority Download – SQL Server Cheatsheet You can download and print this cheat sheet and use it for your personal reference. If you have any suggestions, please let me know and I will see if I can update this SQL Server cheat sheet. Difference Between DBMS and RDBMS What is the difference between DBMS and RDBMS? DBMS – Data Base Management System RDBMS – Relational Data Base Management System or Relational DBMS High Availability – Hot Add Memory Hot Add CPU and Hot Add Memory are extremely interesting features of the SQL Server, however, personally I have not witness them heavily used. These features also have few restriction as well. I blogged about them in detail. 2009 Delete Duplicate Rows I have demonstrated in this blog post how one can identify and delete duplicate rows. Interesting Observation of Logon Trigger On All Servers – Solution The question I put forth in my previous article was – In single login why the trigger fires multiple times; it should be fired only once. I received numerous answers in thread as well as in my MVP private news group. Now, let us discuss the answer for the same. The answer is – It happens because multiple SQL Server services are running as well as intellisense is turned on. Blog post demonstrates how we can do the same with the help of SQL scripts. Management Studio New Features I have selected my favorite 5 features and blogged about it. IntelliSense for Query Editing Multi Server Query Query Editor Regions Object Explorer Enhancements Activity Monitors Maximum Number of Index per Table One of the questions I asked in my user group was – What is the maximum number of Index per table? I received lots of answers to this question but only two answers are correct. Let us now take a look at them in this blog post. 2010 Default Statistics on Column – Automatic Statistics on Column The truth is, Statistics can be in a table even though there is no Index in it. If you have the auto- create and/or auto-update Statistics feature turned on for SQL Server database, Statistics will be automatically created on the Column based on a few conditions. Please read my previously posted article, SQL SERVER – When are Statistics Updated – What triggers Statistics to Update, for the specific conditions when Statistics is updated. 2011 T-SQL Scripts to Find Maximum between Two Numbers In this blog post there are two different scripts listed which demonstrates way to find the maximum number between two numbers. I need your help, which one of the script do you think is the most accurate way to find maximum number? Find Details for Statistics of Whole Database – DMV – T-SQL Script I was recently asked is there a single script which can provide all the necessary details about statistics for any database. This question made me write following script. I was initially planning to use sp_helpstats command but I remembered that this is marked to be deprecated in future. 2012 Introduction to Function SIGN SIGN Function is very fundamental function. It will return the value 1, -1 or 0. If your value is negative it will return you negative -1 and if it is positive it will return you positive +1. Let us start with a simple small example. Template Browser – A Very Important and Useful Feature of SSMS Templates are like a quick cheat sheet or quick reference. Templates are available to create objects like databases, tables, views, indexes, stored procedures, triggers, statistics, and functions. Templates are also available for Analysis Services as well. The template scripts contain parameters to help you customize the code. You can Replace Template Parameters dialog box to insert values into the script. An invalid floating point operation occurred If you run any of the above functions they will give you an error related to invalid floating point. Honestly there is no workaround except passing the function appropriate values. SQRT of a negative number will give you result in real numbers which is not supported at this point of time as well LOG of a negative number is not possible (because logarithm is the inverse function of an exponential function and the exponential function is NEVER negative). Validating Spatial Object with IsValidDetailed Function SQL Server 2012 has introduced the new function IsValidDetailed(). This function has made my life very easy. In simple words, this function will check if the spatial object passed is valid or not. If it is valid it will give information that it is valid. If the spatial object is not valid it will return the answer that it is not valid and the reason for the same. This makes it very easy to debug the issue and make the necessary correction. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Memory Lane, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • xsl defining in xml

    - by aditya parikh
    My first few lines in movies.xml are as follows : <?xml version="1.0" encoding="ISO-8859-1"?> <?xml-stylesheet type="text/xsl" href="movies_style.xsl"?> <movies xmlns="http://www.w3schools.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3schools.com file:///B:/USC/Academic/DBMS/HWS/no3/movie_sch.xsd"> and first few lines in movies_style.xsl are as follows : <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format"> Problem is if remove schema file linking from movies.xml file and keep tag only as <movies> then proper styled table is shown as output else nothing is displayed in browser and error is displayed in console as: "Unsafe attempt to load URL file:///B:/USC/Academic/DBMS/HWS/no3/movies_style.xsl from frame with URL file:///B:/USC/Academic/DBMS/HWS/no3/movies.xml. Domains, protocols and ports must match." Looks like some namespace mistake. Can anyone point out exactly what ?

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  • What database is easy to maintain and manage in a cluster?

    - by Sanoj
    I'm looking for a database (DBMS) that is easy to scale out. I would like to have high availability so I need a multi-master cluster, where the data is replicated to two or more physical computers. I would also like to be able to start with one node (no replication), and then scale out to more nodes as needed without a reinstallation or downtime. I would like to have a DBMS that are easy to maintain and manage. It should be easy to add nodes, remove nodes, take live backup and monitor the use of resources. It doesn't have to be a relational database system, so a NoSQL is okey. And I would like to have a free version so I can test it in small scale and compare it with alternatives. What alternatives do I have?

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  • What is ODBC?

    According to Microsoft, ODBC is a specification for a database API.  This API is database and operating system agnostic due to the fact that the primary goal of the ODBC API is to be language-independent. Additionally, the open functions of the API are created by the manufactures of DBMS-specific drivers. Developers can use these exposed functions from within their own custom applications so that they can communicate with DBMS through the language-independent drivers. ODBC Advantages Multiple ODBC drivers for each DBSM Example Oracle’s ODBC Driver Merant’s Oracle Driver Microsoft’s Oracle Driver ODBC Drivers are constantly updated for the latest data types ODBC allows for more control when querying ODBC allows for Isolation Levels ODBC Disadvantages ODBC Requires DSN ODBC is the proxy between an application and a database ODBC is dependent on third party drivers ODBC Transaction Isolation Levels are related to and limited by the transaction management capabilities of the data source. Transaction isolation levels:  READ UNCOMMITTED Data is allowed to be read prior to the committing of a transaction.  READ COMMITTED Data is only accessible after a transaction has completed  REPEATABLE READ The same data value is read during the entire transaction  SERIALIZABLE Transactions have no effect on other transactions

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  • Cloud Computing and Data Utilization

    - by Ahsan Alam
    Someone recently asked me “is cloud computing going to change the way we perceive data?”. My first instinct was “off course”; but I restrained myself and thought for a moment. Then my answer was “no”. Why do I feel that way? Technology and business have evolved quite a bit in the past few decades; however, the need to effectively view and utilize data hasn't changed. It is not uncommon to see many organization to rely on multiple database management systems (DBMS). Applications and systems are often built to utilize information from all these data sources, and effectively present them to users. In addition to multiple DBMS, corporations are also housing their systems across numerous data centers. In fact, systems and data can reside anywhere around the world with the advent of globalization. Cloud based systems have simply provided us a different place to maintain our data, nothing more. Hosting costs, security and accessibility are different issues; however, the way we utilize and view these data remains the same.

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  • SQLAuthority News – Mark the Date: October 16, 2013 – Introducing NuoDB Blackbirds: THE Distributed Database

    - by Pinal Dave
    I am very excited to announce first on this blog about the release of NuoDB Blackbirds (NuoDB Release 2.0). NuoDB is my favorite application to work with data now a days. They are increasingly gaining market share as well as brining out new features with their every new release. I was very excited when I learned that NuoDB is releasing their flagship release of 2.0 on October 16, 2013. Interesting enough I will be in USA while this release happens and I will be watching it live during my day time. Even though if I had to stay up the entire night to just watch this release, I would do it. Here is the details of the announcements: Introducing NuoDB Blackbirds: THE Distributed Database Date: October 16, 2013 Time: 1:00 PM EDT Location: Online Registration Link What is the best DBMS architecture to handle today’s and tomorrow’s evolving needs? The days of shared disk are over. The times are “a-changin” and IT infrastructure has to change with them. Join NuoDB live for the introduction of our latest major product release, NuoDB Blackbirds, and take a look at why the NuoDB distributed database architecture is the only answer for customers like Fathom Voice, a leading provider of Voice Over IP (VoIP). NuoDB CEO, Barry Morris, welcomes Cameron Weeks, CEO of Fathom Voice to discuss how his company is using DBMS to break away from the pack and become the hottest player in VoIP. The webcast will include demonstrations of a single, logical database running in multiple geographies and a live Q&A. If due to any reason, you cannot watch it live, do not worry at all, just register at this Registration Link, as after the event you will get the link to watch the event on-demand. You can watch the launch event at any time if you have registered for the launch. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL Tagged: NuoDB

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  • ArchBeat Link-o-Rama for 2012-06-27

    - by Bob Rhubart
    Resource Kit: Oracle Exadata for the Communications industry In addition to several customer case studies, in video and white paper formats, this resource kit also includes a technical overview of Oracle Exadata Database Machine and a product datasheet. Registration is required for those who don't already have a free Oracle.com membership account. Call for Nominations: Oracle Fusion Middleware Innovation Awards 2012 - Win a free pass to #OOW12 These awards honor customers for their cutting-edge solutions using Oracle Fusion Middleware. Either a customer, their partner, or an Oracle representative can submit the nomination form on behalf of the customer. Submission deadline: July 17. Winners receive a free pass to Oracle OpenWorld 2012 in San Francisco. BPM – Disable DBMS job to refresh B2B Materialized View | Mark Nelson "If you are running BPM and you are not using B2B, you might want to disable the DBMS job that refreshes the B2B materialized view," says Fusion Middleware A-Team blogger Mark Nelson. Learn how in his short post. A Universal JMX Client for Weblogic –Part 1: Monitoring BPEL Thread Pools in SOA 11g | Stefan Koser A concise how-to from Oracle Fusion Middleware A-Team blogger Stefan Koser. Thought for the Day "There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." — C. A. R. Hoare Source: SoftwareQuotes.com/

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  • ??UFJ??????????????????????·?????WebLogic Server??????????????? ?????? ????? 2011?????|WebLogic Channel|??????

    - by ???02
    ??UFJ???????·?????IT????????UFJ???????????????(MUIT)?????UFJ?????????????????????????·????·????????????????????????WebLogic Server???????????????????·?????????IT?????????WebLogic Server??????? MUIT IT??????? ??????????2011?11?30???????????? ?????? ????? 2011??????????UFJ???????????????????Java EE???????WebLogic Server????????????????????(???)???UFJ???????·??????????????2????????·????????? MUIT????????????2009?7?1??????????????????????UFJ????????UFJIS?3???????????????UFJ???????UFJ???????·?????IT???????????????????????????????1,500????????????SIer??????????????? ????????MUIT??Java???2?????????PaaS?????/???????????????????????PaaS????????????????????????????????????????????????????????Java EE?????????????????????????????????????????????????????????????? OLTP??????????????????????????2000???????????????10???????????????????????·?????????????????????(???)????????/??????????·?????????????????????????????????????????????????????????Java EE???????????????????????????????????·??????WebLogic Server?????DBMS???Oracle Database????????? ?????????????????????????2006?????????2008????????????????????????????????????????????????????????????????????????????????????????"??·??????·???????"?????????MUIT?????????????????·??????????????????????????????????????????·?????GlassFish??DBMS??DB2???MySQL?????BPM??????Oracle BPEL Process Manager???????????????·?????????????WebLogic Server??? MUIT???????????????????????????WebLogic Server?????????????50?????????????????????????????????????????·???????????????????????????Oracle Real Application Clusters(RAC)????????????????? ?????????????·????????????·????????????Java EE??????????????Java EE????????????????????????????????Java EE????????????·??????·?????????????????????????????????????????????·???????WebLogic Server????????????? ???MUIT???WebLogic Server????????????????????????????????????????????????????WebLogic Scripting Tool(WLST)??????????????????????????????????????????????? ????????????????????????????????????WebLogic Server?????????????????????????????????????????Web??????????????URL?????????/?????????????·??????????????????1??????????????????????????????????????????????? ????????????????????????????????????????PDF??????????????????????????????????????????????????????????????????????????????????????????????????????(???) ??????????????????????????????????????????Oracle RAC??????1??WebLogic Server?????????RAC????????Oracle?????????????????????????????????????????????Oracle??????????????????????????????????RAC???Oracle?????????????????????????????????????????????????????????????Oracle???????????????????????????????????? ???????????????????????????????????????????????????????·??????????????????????????·??????????????WebLogic Server?????????????????????????????????????????JVM????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????HTTP???????????????????????????????????????????????????·??????????????????????????1???????????????????????????????????????????????·?????????????????????????????????????????????? ????????????????WLST??WLST??Python?Java?????Jython????WebLogic Server???????????????????·????????????????????????????????????????????????????????????????????????MUIT???WebLogic Server????????????????WebLogic Server???????????????????????????????/??????????WLST???????????WLST????WebLogic Server???/?????????????WebLogic Channel?????????·???????! ?WebLogic Scripting Tool????WebLogic Server???/???????????????? ????????????WebLogic Server?????????????Java EE??????????????·??????????????????????????????????·????????????????·???????????????????????????(???)???????????????????????????????????MUIT????????????????WebLogic Server??????????????????????·??????·???????????WebLogic Server??????????????WebLogic Channel??????????????????????????????????WebLogic Server????????·??????????――?????·??????·???????????WebLogic???????????????????????????WebLogic Server??????????????????????TCO?――????????????????WebLogic???????

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  • Microsoft Sql Server 2008 R2 System Databases

    For a majority of software developers little time is spent understanding the inner workings of the database management systems (DBMS) they use to store data for their applications.  I personally place myself in this grouping. In my case, I have used various versions of Microsoft’s SQL Server (2000, 2005, and 2008 R2) and just recently learned how valuable they really are when I was preparing to deliver a lecture on "SQL Server 2008 R2, System Databases". Microsoft Sql Server 2008 R2 System DatabasesSo what are system databases in MS SQL Server, and why should I know them? Microsoft uses system databases to support the SQL Server DBMS, much like a developer uses config files or database tables to support an application. These system databases individually provide specific functionality that allows MS SQL Server to function. Name Database File Log File Master master.mdf mastlog.ldf Resource mssqlsystemresource.mdf mssqlsystemresource.ldf Model model.mdf modellog.ldf MSDB msdbdata.mdf msdblog.ldf Distribution distmdl.mdf distmdl.ldf TempDB tempdb.mdf templog.ldf Master DatabaseIf you have used MS SQL Server then you should recognize the Master database especially if you used the SQL Server Management Studio (SSMS) to connect to a user created database. MS SQL Server requires the Master database in order for DBMS to start due to the information that it stores. Examples of data stored in the Master database User Logins Linked Servers Configuration information Information on User Databases Resource DatabaseHonestly, until recently I never knew this database even existed until I started to research SQL Server system databases. The reason for this is due largely to the fact that the resource database is hidden to users. In fact, the database files are stored within the Binn folder instead of the standard MS SQL Server database folder path. This database contains all system objects that can be accessed by all other databases.  In short, this database contains all system views and store procedures that appear in all other user databases regarding system information. One of the many benefits to storing system views and store procedures in a single hidden database is the fact it improves upgrading a SQL Server database; not to mention that maintenance is decreased since only one code base has to be mainlined for all of the system views and procedures. Model DatabaseThe Model database as the name implies is the model for all new databases created by users. This allows for predefining default database objects for all new databases within a MS SQL Server instance. For example, if every database created by a user needs to have an “Audit” table when it is  created then defining the “Audit” table in the model will guarantees that the table will be located in every new database create after the model is altered. MSDB DatabaseThe MSDBdatabase is used by SQL Server Agent, SQL Server Database Mail, SQL Server Service Broker, along with SQL Server. The SQL Server Agent uses this database to store job configurations and SQL job schedules along with SQL Alerts, and Operators. In addition, this database also stores all SQL job parameters along with each job’s execution history.  Finally, this database is also used to store database backup and maintenance plans as well as details pertaining to SQL Log shipping if it is being used. Distribution DatabaseThe Distribution database is only used during replication and stores meta data and history information pertaining to the act of replication data. Furthermore, when transactional replication is used this database also stores information regarding each transaction. It is important to note that replication is not turned on by default in MS SQL Server and that the distribution database is hidden from SSMS. Tempdb DatabaseThe Tempdb as the name implies is used to store temporary data and data objects. Examples of this include temp tables and temp store procedures. It is important to note that when using this database all data and data objects are cleared from this database when SQL Server restarts. This database is also used by SQL Server when it is performing some internal operations. Typically, SQL Server uses this database for the purpose of large sort and index operations. Finally, this database is used to store row versions if row versioning or snapsot isolation transactions are being used by SQL Server. Additionally, I would love to hear from others about their experiences using system databases, tables, and objects in a real world environments.

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  • Microsoft Sql Server 2008 R2 System Databases

    For a majority of software developers little time is spent understanding the inner workings of the database management systems (DBMS) they use to store data for their applications.  I personally place myself in this grouping. In my case, I have used various versions of Microsoft’s SQL Server (2000, 2005, and 2008 R2) and just recently learned how valuable they really are when I was preparing to deliver a lecture on "SQL Server 2008 R2, System Databases". Microsoft Sql Server 2008 R2 System DatabasesSo what are system databases in MS SQL Server, and why should I know them? Microsoft uses system databases to support the SQL Server DBMS, much like a developer uses config files or database tables to support an application. These system databases individually provide specific functionality that allows MS SQL Server to function. Name Database File Log File Master master.mdf mastlog.ldf Resource mssqlsystemresource.mdf mssqlsystemresource.ldf Model model.mdf modellog.ldf MSDB msdbdata.mdf msdblog.ldf Distribution distmdl.mdf distmdl.ldf TempDB tempdb.mdf templog.ldf Master DatabaseIf you have used MS SQL Server then you should recognize the Master database especially if you used the SQL Server Management Studio (SSMS) to connect to a user created database. MS SQL Server requires the Master database in order for DBMS to start due to the information that it stores. Examples of data stored in the Master database User Logins Linked Servers Configuration information Information on User Databases Resource DatabaseHonestly, until recently I never knew this database even existed until I started to research SQL Server system databases. The reason for this is due largely to the fact that the resource database is hidden to users. In fact, the database files are stored within the Binn folder instead of the standard MS SQL Server database folder path. This database contains all system objects that can be accessed by all other databases.  In short, this database contains all system views and store procedures that appear in all other user databases regarding system information. One of the many benefits to storing system views and store procedures in a single hidden database is the fact it improves upgrading a SQL Server database; not to mention that maintenance is decreased since only one code base has to be mainlined for all of the system views and procedures. Model DatabaseThe Model database as the name implies is the model for all new databases created by users. This allows for predefining default database objects for all new databases within a MS SQL Server instance. For example, if every database created by a user needs to have an “Audit” table when it is  created then defining the “Audit” table in the model will guarantees that the table will be located in every new database create after the model is altered. MSDB DatabaseThe MSDBdatabase is used by SQL Server Agent, SQL Server Database Mail, SQL Server Service Broker, along with SQL Server. The SQL Server Agent uses this database to store job configurations and SQL job schedules along with SQL Alerts, and Operators. In addition, this database also stores all SQL job parameters along with each job’s execution history.  Finally, this database is also used to store database backup and maintenance plans as well as details pertaining to SQL Log shipping if it is being used. Distribution DatabaseThe Distribution database is only used during replication and stores meta data and history information pertaining to the act of replication data. Furthermore, when transactional replication is used this database also stores information regarding each transaction. It is important to note that replication is not turned on by default in MS SQL Server and that the distribution database is hidden from SSMS. Tempdb DatabaseThe Tempdb as the name implies is used to store temporary data and data objects. Examples of this include temp tables and temp store procedures. It is important to note that when using this database all data and data objects are cleared from this database when SQL Server restarts. This database is also used by SQL Server when it is performing some internal operations. Typically, SQL Server uses this database for the purpose of large sort and index operations. Finally, this database is used to store row versions if row versioning or snapsot isolation transactions are being used by SQL Server. Additionally, I would love to hear from others about their experiences using system databases, tables, and objects in a real world environments.

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  • CodePlex Daily Summary for Monday, November 28, 2011

    CodePlex Daily Summary for Monday, November 28, 2011Popular ReleasesCommonLibrary.NET: CommonLibrary.NET 0.9.8 - Alpha: A collection of very reusable code and components in C# 4.0 ranging from ActiveRecord, Csv, Command Line Parsing, Configuration, Holiday Calendars, Logging, Authentication, and much more. Samples in <root>\src\Lib\CommonLibrary.NET\Samples CommonLibrary.NET 0.9.8 AlphaNew Dynamic Scripting Language : workitem : 7493 Fixes 1622 6803Widget Suite for DotNetNuke: 01.04.00: The following features/enhancements are associated with this release: Bug: Removed the empty box/white space created by some widgets New Widget: FlexSlider New Widget: Google+ Button New Widget: Klout Badge Sample Widget Script FileTools for SharePoint: Reset SharePoint Configuration Cache: This tool is used to detect the existing location of the SharePoint configuration cache files then remove them to trigger the timer service to rebuild a fresh new cache. This tool runs on any SharePoint box version 2003 and above supporting x64 bit & x32 bit OS assuming .NET framework 3.5 is installed. You must run the tool with elevated privileges if running on Win 2008 server to ensure that the tool has enough rights to restart the timer service. The tool auto-detects whether its running i...WinRT File Based Database: 0.9.1.5: Implement IsBusy property to support Save button state. See Quick Start project that is distributed as part of the download for details on how to implement Save button, use IsBusy property and how to implement SimpleCommand to use behind the Save button.Multiwfn: Multiwfn2.2_source: Multiwfn2.2_sourceBatchus-GUI: Batchus-GUI-vb 0.1.3.3: Here is v0.1.3.3. It is relatively stable. Just need some more designer layout, and tutorials, and templates.Groovy IM: Groovy IM Version 0.3: Groovy IM Version 0.3 for Windows Phone 7Internet Cache Examiner: Internet Cache Examiner 0.9.2: This is the release binary for the 0.9.2 version of Internet Cache Examiner.Composite Data Service Framework: Composite Data Service Framework 1.0: This solution contains the Composite Data Service framework solution along with a Sample Project.FxCop Integrator for Visual Studio 2010: FxCop Integrator 2.0.0 RC: Replaced the MSBuild Tasks installer to fix the bug of the targets file. FxCop Integrator is not affected by this bug. (Nov 28 2011) New FeatureSupported calculating code metrics with Code Metrics PowerTool. (Work Item #6568: 6568). Provided MSBuild tasks. #7454: 7454 Supported to filter out auto-generated code from code analysis result. #7485: 7485 Supported exporting report of code analysis result. Supported multi-project analysis. Supported file level analysis. Added the featu...Terminals: Version 2 - Beta 4 Release: Beta 4 Refresh Build Dont forget to backup your config files BEFORE upgrading! As usual, please take time to use and abuse this release. We left logging in place, and this is a debug build so be sure to submit your logs on each bug reported, and please do report all bugs! Updated the About form to include the date and time of the build. Useful for CI builds to ensure we have the correct version "Favourites" and "History" save their expanded states after app restarts Code cleanup, secu...MiniTwitter: 1.76: MiniTwitter 1.76 ???? ?? ?????????? User Streams ???????????? User Streams ???????????、??????????????? REST ?????????? ?????????????????????????????? ??????????????????????????????Media Companion: MC 3.424b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) Movie Show Resolutions... Resolved issue when reverting multiselection of movies to "-none-" Added movie rename support for subtitle files '.srt' & '.sub' Finalised code for '-1' fix - radiobutton to choose either filename or title Fixed issue with Movie Batch Wizard Fanart - ...Advanced Windows Phone Enginering Tool: WPE Downloads: This version of WPE gives you basic updating, restoring, and, erasing for your Windows Phone device.Anno 2070 Assistant: Beta v1.0 (STABLE): Anno 2070 Assistant Beta v1.0 Released! Features Included: Complete Building Layouts for Ecos, Tycoons & Techs Complete Production Chains for Ecos, Tycoons & Techs Completed Credits Screen Known Issues: Not all production chains and building layouts may be on the lists because they have not yet been discovered. However, data is still 99.9% complete. Currently the Supply & Demand, including Calculator screen are disabled until version 1.1.Minemapper: Minemapper v0.1.7: Including updated Minecraft Biome Extractor and mcmap to support the new Minecraft 1.0.0 release (new block types, etc).Visual Leak Detector for Visual C++ 2008/2010: v2.2.1: Enhancements: * strdup and _wcsdup functions support added. * Preliminary support for VS 11 added. Bugs Fixed: * Low performance after upgrading from VLD v2.1. * Memory leaks with static linking fixed (disabled calloc support). * Runtime error R6002 fixed because of wrong memory dump format. * version.h fixed in installer. * Some PVS studio warning fixed.NetSqlAzMan - .NET SQL Authorization Manager: 3.6.0.10: 3.6.0.10 22-Nov-2011 Update: Removed PreEmptive Platform integration (PreEmptive analytics) Removed all PreEmptive attributes Removed PreEmptive.dll assembly references from all projects Added first support to ADAM/AD LDS Thanks to PatBea. Work Item 9775: http://netsqlazman.codeplex.com/workitem/9775VideoLan DotNet for WinForm, WPF & Silverlight 5: VideoLan DotNet for WinForm, WPF, SL5 - 2011.11.22: The new version contains Silverlight 5 library: Vlc.DotNet.Silverlight. A sample could be tested here The new version add and correct many features : Correction : Reinitialize some variables Deprecate : Logging API, since VLC 1.2 (08/20/2011) Add subitem in LocationMedia (for Youtube videos, ...) Update Wpf sample to use Youtube videos Many others correctionsSharePoint 2010 FBA Pack: SharePoint 2010 FBA Pack 1.2.0: Web parts are now fully customizable via html templates (Issue #323) FBA Pack is now completely localizable using resource files. Thank you David Chen for submitting the code as well as Chinese translations of the FBA Pack! The membership request web part now gives the option of having the user enter the password and removing the captcha (Issue # 447) The FBA Pack will now work in a zone that does not have FBA enabled (Another zone must have FBA enabled, and the zone must contain the me...New ProjectsA lightweight database access component: DataAccessor?????????????,??DataAccessor????????????: 1.??????????SQL??,?????SQL???????????; 2.?????????; 3.????????????,??MSAccess??????????????????????????????????????,?????????; 4.?????????????DBMS,??:SqlServer、Oracle??MSAccess,??????DBMS???,??????N?????????; 5.????,?????????DataAccess??????DBMS; 6.???Sql????xml??????????????dbms?SQL?????,??sql??????????????; 7.???,???DLL??????????……AdHoc.Wavesque: Wavesque provides a simple infrastructure to generate waveforms.AIRO - Interoperable Experiment Automation Package: The main goal of this project is to provide engineers and scientists flexible and extendable framework for building test, measurement and control applications. This framework is compatible with IVI-COM drivers and extends IVI Instrument Classes with custom .NET (and COM) interfaces for such devices as: step motors, different positioning devices, magnet power supplies, lock-in amplifiers etc. We maintain IVI Foundation's aim: "simplify upgrading or replacing components in complex test systems...AKBK-Schulprojekt - USB-Guard: Das Projekt USB-Überwachung wird im Rahmen des Anwendungsentwicklungs-Unterrichts des Adolf-Kolping-Berufskollegs geplant und durchgeführt. Die Software wird zur Prävention von Manipulationsversuchen während einer Informatikklausur entwickelt. Sie erkennt manipulierte und nicht erlaubte USB-Datenträger, protokolliert deren Inhalt und gibt ggf. eine Warnung aus. Sie hilft dem Lehrer dabei, Manipulationsversuche schneller und effizienter zu erkennen.Android Vision: Project to learn all things Android and some image processingAuto Fill Title of Document in Document Library in SharePoint 2010: Automatically fill title of any document in any document library in SharePoint 2010.Batchus-GUI: A graphical user interface, used to create batch files.Bazeli: Windows Phone 7 application that supports tracking of expenses.Clannad: This is a family of many things.Csv2Entity: CSV 2 Entity is a serials of tools that deal with CSV files as well as Excel files and Access files. This framework include: A VSIX file which contains VB and CS source code generate wizard for CSV Objects. Read/Write CSV files facilities. Documentation Help facilities.Cypher Bot: Encrypt secrets, messages, documents, files and more. Then decrypt them. Then repeat with the US government's encryption standard: AES 256-bit (Accepted by NIST and NSA).Cypher Bot makes it fun and easy for anyone to secure files. This is the best security solution available on the web. You are now able to encrypt/decrypt files (avi, mov, mpeg, mp3, wav, png, jpg, txt, html, vb, js) and text ALL IN ONE beautiful slick interface. Cypher Bot is developed in visual basic.EmailWebLinker: A very simple text to html converter designed to deal with those email messages that contain a list of links to images. Any http links it finds to pictures are converted inline. eps files are downloaded and rendered. Can be easily extended.FileHasher: This project provides a simple tool for generating and verifying file hashes. I created this to help the QA team I work with. The project is all C# using .NET 3.5 SP1.Financial Controls: WPF/Silverlight Controls for Financial ApplicationsGroovy IM: Groovy IM makes it easy for Windows Phone 7 consumers to chat while on there Windows Phone 7 device(s). Groovy IM is developed in C# under the GPL V2 license.IBlog: Project created to learn things ASP.NETInjectivity (Dependency Injection): Injectivity is a dependency injection framework (written in C#) with a strong focus on the ease of configuration and performance. Having been written over 5 years and at version 2.8 with unit tests & intellisense comments it is a mature framework.Lizard Chess: Chess openings preparation tool using F#. WinForms C# used for UI.MCPD: I am doing a self study course for MCPD in .NET 4 (web track), so I am committing any custom source code as a result of my study in this open source location which I can later show the work for. * MCTS Exam 70-515 Web Applications Development with Microsoft .NET Framework 4MVC TreeView Helper: This fluent MVC TreeView helper makes it easy to build and customize an HTML unordered-list tree from a recursive model.Onion Architecture with ASP.NET MVC: Onion Architecture with ASP.NET MVCOpenBank: OpenBank est une application client/serveur destinée à la gestion de compte banquaire.Philosophy Widget: This Widget for the Mac OS X Dashboard aids in memorizing the association between known works of philosophy and their authors.Physic Engine: Physic EnginePUL Programming Utility Language: PUL is a programming utility language that allows people to do tasks automatically without having to manually do them, which that process would take longer. Using PUL, you can make programs that automatically do the work for you.QuakeMeApp: QuakeMeApp is a Windows Phone 7 Earthquake Alert AppSense/Net SourceCode Field Control: This is a Field Control for Sense/Net ECMS, it provides syntax highlighting.Silverlight Video CoverFlow: This a Silverlight Sample Application including a Coverflow of Video (streaming)SpaceConquest: Incorporated standard design patterns to build a peer to peer game in Java. The game rules were similar in complexity to games like Civilization and StarcraftSPGE - An XNA 2D graphics engine for Windows and Windows Phone 7.: SPGE is an open-source graphics engine build over XNA that allows the creation of simple 2D games that target Windows and Windows Phone 7. The aim of this graphic engine is to allow for an easy creation of simle 2D games, game prototyping, and teaching of game development.SQL CRUD Expression Builder: A library to build sql crud commands that is based on expressions so every part of the sql statement could be an expression like ColumnSetExpression, FilterExpression, JoinExpression, etc, is intended to be agnostic but right now is being tested only with SqlServer and MySql.TDD-Katas: *TDD-Katas* simply defines the Test Driven Development Katas. In this, I tried to create most famous katas to understand what is exactly Kata. So, get into the code and let us know for any improvementTFS Team Project Manager: TFS Team Project Manager automates various tasks across Team Projects in Team Foundation Server. If you find yourself managing multiple Team Projects for an organization and have recurring tasks and questions that repeat themselves over and over again, Team Project Manager probably has some answers for you. Team Project Manager can help you... * Manage build process templates (understanding which build templates are used by which build definitions, uploading new build process templates,...USB Camera Driver for Windows Embedded Compact 7: This project helps people to get the USB camera working on the Windows Embedded Compact 7.This is modified source of the WinCE 6.0 USB Camera Shared source available from the following link http://www.microsoft.com/download/en/details.aspx?id=19512 User Profile with RecordID replicator: <User Profile with RecordID replicator> will let SharePoint 2010 administrators create a new Profile database maintaining the RecordId of the profile to make sure the social features (I like it, tags, notes) are not gone.VS Tool for WSS 3.0: Visual Studio (2005 and 2008) add-ons for WSS. Included: - schema.xml explorerWhs2Smugmug: Windows Home Server Add-In for uploading files to Smugmug. Written in C# using .Net 3.5 and WCF. Also using the Smugmug API Project. ??UBBCODE: PHP????UBBCODE????,??????: 1.??????(10px ? 24px); 2.????; 3.?????; 4.??????; 5.??????; 6.??????(????????????); 7.??????; 8.?????; 9.?????; 10.???QQ??,??????; 11.???????(?????,??????????); 12.?????????; 13.????????; 14.?????????; 15.?????????; 16.?????????。

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  • web2py or grok (zope) on a big portal,

    - by Robert
    Hi, I am planning to make some big project (1 000 000 users, approximately 500 request pre second - in hot time). For performance I'm going to use no relational dbms (each request could cost lot of instructions in relational dbms like mysql) - so i can't use DAL. My question is: how web2py is working with a big traffic, is it work concurrently? I'm consider to use web2py or Gork - Zope, How is working zodb(Z Object Database) with a lot of data? Is there some comparison with object-relational postgresql? Could you advice me please.

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  • Adhoc Data processing / ETL

    - by Dane
    I've just started at a new company in outsourced communications (e.g. print and mail, email, fax). One of the requirements is to process clients data and get it ready for mailing. For recurring jobs, this is easy using an ETL tool linked in with some addressing software, but for adhoc stuff it's a bit overkill. I've used inhouse developed stuff before (clunky but usable), but I don't want to have to re-develop that here. Any recommendations? Some features : Basic DBMS functionality (preferably with a proper DBMS backend for SQL support) Field concatenation (e.g. combine Firstname + Surname) "Pushing columns" (e.g. with address fields 1 - 8, push them left so if one is blank, the next one gets pushed up) Australia post mail sorting and dpid allocation (or can link into external tools relatively easily)

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  • Sybase ASE

    - by Linchi Shea
    I sat in a Sybase ASE class last week for five days. Although it didn't cover the more advanced features introduced in the more recent versions of Sybase ASE, the class did touch all the basics of administering Sybase ASE. While I was successful in suppressing any urge to openly compare Sybase ASE with Microsoft SQL Server in the class, I could not help making mental notes on the differences between the two database platforms. It's always interesting to look at how two DBMS platforms that share the...(read more)

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  • Five Things To Which SQL Server Should Say "Goodbye and Good Riddance"

    - by Adam Machanic
    I was tagged by master blogger Aaron Bertrand and asked to identify five things that should be removed from SQL Server. Easy enough, or so I thought... 1) Tempdb . But I should qualify that a bit. Tempdb is absolutely necessary for SQL Server to properly function, but in its current state is easily the number one bottleneck in the majority of SQL Server instances. Many other DBMS vendors abandoned the "monolithic, instance-scoped temporary data space" years ago, yet SQL Server soldiers on, putting...(read more)

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  • Dependently typed language best suited to “real world” programming?

    - by Kim
    Which dependently typed programming languages could be used for real world application development? I will mostly be writing toy applications at first, after that maybe web development or a simple DBMS. These are some points, that I think are important: documentation example programs a good/big standard library an easy to use foreign function interface a community of people using the language for real world tasks tool support

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  • Five Things To Which SQL Server Should Say "Goodbye and Good Riddance"

    - by Adam Machanic
    I was tagged by master blogger Aaron Bertrand and asked to identify five things that should be removed from SQL Server. Easy enough, or so I thought... 1) Tempdb . But I should qualify that a bit. Tempdb is absolutely necessary for SQL Server to properly function, but in its current state is easily the number one bottleneck in the majority of SQL Server instances. Many other DBMS vendors abandoned the "monolithic, instance-scoped temporary data space" years ago, yet SQL Server soldiers on, putting...(read more)

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  • Referential Integrity: Best Practices for IBM DB2

    Of the various constraints possible on relational tables, referential constraints are perhaps the most common ... and most misused. Learn about the advantages and disadvantages of different methods to implement and enforce RI, and issues that must be addressed when implementing DBMS-enforced Referential Integrity.

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  • SQL Express Edition, SQL Compact Editin and SQLCMD for learning purpose

    - by Mil
    Hi, I want to learn programming in SQL from some SQL tutorial sites of which I heard of here but I need some environment for executing query's. I think I have both SQL CE and SQL EE installed on my computer but I have some doubts about these DBMS and I don't know exactly how to use SQLCMD utility so I hope someone here will have time and will to explain me the following: Since running sqlcmd -S.\sqlexpress at command prompt command gives "1" prompt I assume I have SQL express installed but anyway how can I be sure what I have installed on my machine since I cannot find in installed programs SQL Express Edition name? Can I ship and use database with my C# (VC# Express) application which was created with SQL EE (embedded?)? How can use sqlcmd for learning SQL, that is by issuing commands like create, use, select..., again emphasize is on learning SQL I do not want to run scripts but use interactive command prompt like with MySQL (since I want to use SQL I would pretty much like to avoid graphical tools for DBMS)? Please tell me if you have some other advice regarding as to what should I better use in learning how to program in SQL or should I stick with the above for now. Thanks in advance.

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  • Need advice on comparing the performance of 2 equivalent linq to sql queries

    - by uvita
    I am working on tool to optimize linq to sql queries. Basically it intercepts the linq execution pipeline and makes some optimizations like for example removing a redundant join from a query. Of course, there is an overhead in the execution time before the query gets executed in the dbms, but then, the query should be processed faster. I don't want to use a sql profiler because I know that the generated query will be perform better in the dbms than the original one, I am looking for a correct way of measuring the global time between the creation of the query in linq and the end of its execution. Currently, I am using the Stopwatch class and my code looks something like this: var sw = new Stopwatch(); sw.Start(); const int amount = 100; for (var i = 0; i < amount; i++) { ExecuteNonOptimizedQuery(); } sw.Stop(); Console.Writeline("Executing the query {2} times took: {0}ms. On average, each query took: {1}ms", sw.ElapsedMilliseconds, sw.ElapsedMilliseconds / amount, amount); Basically the ExecutenNonOptimizedQuery() method creates a new DataContext, creates a query and then iterates over the results. I did this for both versions of the query, the normal one and the optimized one. I took the idea from this post from Frans Bouma. Is there any other approach/considerations I should take? Thanks in advance!

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  • Spring + iBatis + Hessian caching

    - by ILya
    Hi. I have a Hessian service on Spring + iBatis working on Tomcat. I'm wondering how to cache results... I've made the following config in my sqlmap file: <sqlMap namespace="Account"> <cacheModel id="accountCache" type="MEMORY" readOnly="true" serialize="false"> <flushInterval hours="24"/> <flushOnExecute statement="Account.addAccount"/> <flushOnExecute statement="Account.deleteAccount"/> <property name="reference-type" value="STRONG" /> </cacheModel> <typeAlias alias="Account" type="domain.Account" /> <select id="getAccounts" resultClass="Account" cacheModel="accountCache"> fix all; select id, name, pin from accounts; </select> <select id="getAccount" parameterClass="Long" resultClass="Account" cacheModel="accountCache"> fix all; select id, name, pin from accounts where id=#id#; </select> <insert id="addAccount" parameterClass="Account"> fix all; insert into accounts (id, name, pin) values (#id#, #name#, #pin#); </insert> <delete id="deleteAccount" parameterClass="Long"> fix all; delete from accounts where id = #id#; </delete> </sqlMap> Then i've done some tests... I have a hessian client application. I'm calling getAccounts several times and after each call it's a query to DBMS. How to make my service to query DBMS only a first time (after server restart) getAccounts called and for the following calls to use a cache?

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