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  • Database with "Open Schema" - Good or Bad Idea?

    - by Claudiu
    The co-founder of Reddit gave a presentation on issues they had while scaling to millions of users. A summary is available here. What surprised me is point 3: Instead, they keep a Thing Table and a Data Table. Everything in Reddit is a Thing: users, links, comments, subreddits, awards, etc. Things keep common attribute like up/down votes, a type, and creation date. The Data table has three columns: thing id, key, value. There’s a row for every attribute. There’s a row for title, url, author, spam votes, etc. When they add new features they didn’t have to worry about the database anymore. They didn’t have to add new tables for new things or worry about upgrades. This seems like a terrible idea to me, but it seems to have worked out for Reddit. Is it a good idea in general, though? Or is it a peculiarity of Reddit that happened to work out for them?

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  • should this database table be normalized?

    - by oo
    i have taken over a database that stores fitness information and we were having a debate about a certain table and whether it should stay as one table or get broken up into three tables. Today, there is one table called: workouts that has the following fields id, exercise_id, reps, weight, date, person_id So if i did 2 sets of 3 different exercises on one day, i would have 6 records in that table for that day. for example: id, exercise_id, reps, weight, date, person_id 1, 1, 10, 100, 1/1/2010, 10 2, 1, 10, 100, 1/1/2010, 10 3, 1, 10, 100, 1/1/2010, 10 4, 2, 10, 100, 1/1/2010, 10 5, 2, 10, 100, 1/1/2010, 10 6, 2, 10, 100, 1/1/2010, 10 So the question is, given that there is some redundant data (date, personid, exercise_id) in multiple records, should this be normalized to three tables WorkoutSummary: - id - date - person_id WorkoutExercise: - id - workout_id (foreign key into WorkoutSummary) - exercise_id WorkoutSets: - id - workout_exercise_id (foreign key into WorkoutExercise) - reps - weight I would guess the downside is that the queries would be slower after this refactoring as now we would need to join 3 tables to do the same query that had no joins before. The benefit of the refactoring allows up in the future to add new fields at the workout summary level or the exercise level with out adding in more duplication. any feedback on this debate?

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  • Database design grouping contacts by lists and companies

    - by Serge
    Hi, I'm wondering what would be the best way to group contacts by their company. Right now a user can group their contacts by custom created lists but I'd like to be able to group contacts by their company as well as store the contact's position (i.e. Project Manager of XYZ company). Database wise this is what I have for grouping contacts into lists contact [id_contact] [int] PK NOT NULL, [lastName] [varchar] (128) NULL, [firstName] [varchar] (128) NULL, ...... contact_list [id_contact] [int] FK, [id_list] [int] FK, list [id_list] [int] PK [id_user] [int] FK [list_name] [varchar] (128) NOT NULL, [description] [TEXT] NULL Should I implement something similar for grouping contacts by company? If so how would I store the contact's position in that company and how can I prevent data corruption if a user modifies a contact's company name. For instance John Doe changed companies but the other co-workers are still in the old company. I doubt that will happen often (might not even happen at all) but better be safe than sorry. I'm also keeping an audit trail so in a way the contact would still need to be linked to the old company as well as the new one but without confusing what company he's actually working at the moment. I hope that made sense... Has anyone encountered such a problem? UPDATE Would something like this make sense contact_company [id_contact_company] [int] PK [id_contact] [int] FK [id_company] [int] FK [contact_title] [varchar] (128) company [id_company] [int] PK NOT NULL, [company_name] [varchar] (128) NULL, [company_description] [varchar] (300) NULL, [created_date] [datetime] NOT NULL This way a contact can work for more than one company and contacts can be grouped by companies

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  • Database Developer - October 2013 issue: Download Database 12c and related products

    - by Javier Puerta
    The October issue of the Database Application Developer  newsletter is now available. The focus of this issue is on downloads of Database 12c and related products. (Full newsletter here) Get Ready to Download, Deploy and Develop for Oracle Database 12c This month we're focused on downloads. We've rounded up the top developer releases (both early adopter and BETA releases) and the articles that will help you do more with Oracle 12c. See the technical content that will help you get started. If you're ready...Away we go! — Laura Ramsey, Database and Developer Community, Oracle Technology Network Team FEATURED DOWNLOADS Download: Oracle Database 12c According Tom Kyte, the Oracle 12c version has some of the biggest enhancements to the core database since version 6 - Check it out for yourself. Download: Oracle SQL Developer 4.0 Early Adopter 2 is Here Oracle SQL Developer is a free IDE that simplifies the development and management of Oracle Database. It is a complete end-to-end development platform for your PL/SQL applications that features a worksheet for running queries and scripts, a DBA console for managing the database, a reports interface, a complete data modeling solution and a migration platform for moving your 3rd party databases to Oracle.  If you are interested in checking out this new early adopter version,Oracle SQL Developer 4.0 EA is the place to go. Download: Oracle 12c Multitenant Self Provisioning Application -BETA- The -BETA- is here. The Multitenant self provisioning Application is an easy and productive way for DBAs and Developers to get familiar with powerful PDB features including create, clone, plug and unplug.   No better time to start playing with PDBs. Oracle 12c Multitenant Self Provisioning Application. Download: New! Updates to Oracle Data Integration Portfolio Oracle GoldenGate 12c and Oracle Data Integrator 12c is now available. From Real-Time data integration, transactional change data capture, data replication, transformations....to hi-volume, high-performance batch loads, event-driven, trickle-feed integration process..its now available. Go here all the details and links to downloads...and Congratulations Data Integration Team!. Download: Oracle VM Templates for Oracle 12c Features Support for Single Instance, Oracle Restart and Oracle RAC Support for all current Oracle Database 11.2 versions as well as Oracle 12c on Oracle Linux 5 Update 9 & Oracle Linux 6 Update 4. The Oracle 12c templates allow end-to-end automation for Flex Cluster, Flex ASM and PDBs. See how the Deploycluster tool was updated to support Single Instance and the new Oracle 12c features. Oracle VM Templates for Oracle Database. Download: Oracle SQL Developer Data Modeler 4.0 EA 3 If you're looking for a datamodeling and database design tool that provides an environment for capturing, modeling, managing and exploiting metadata, it's time to check out Oracle SQL Developer Data Modeler. Oracle SQL Developer Data Modeler 4.0 EA V3 is here.

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  • Database Developer - October 2013 issue: Download Database 12c and related products

    - by Javier Puerta
    The October issue of the Database Application Developer  newsletter is now available. The focus of this issue is on downloads of Database 12c and related products. (Full newsletter here) Get Ready to Download, Deploy and Develop for Oracle Database 12c This month we're focused on downloads. We've rounded up the top developer releases (both early adopter and BETA releases) and the articles that will help you do more with Oracle 12c. See the technical content that will help you get started. If you're ready...Away we go! — Laura Ramsey, Database and Developer Community, Oracle Technology Network Team FEATURED DOWNLOADS Download: Oracle Database 12c According Tom Kyte, the Oracle 12c version has some of the biggest enhancements to the core database since version 6 - Check it out for yourself. Download: Oracle SQL Developer 4.0 Early Adopter 2 is Here Oracle SQL Developer is a free IDE that simplifies the development and management of Oracle Database. It is a complete end-to-end development platform for your PL/SQL applications that features a worksheet for running queries and scripts, a DBA console for managing the database, a reports interface, a complete data modeling solution and a migration platform for moving your 3rd party databases to Oracle.  If you are interested in checking out this new early adopter version,Oracle SQL Developer 4.0 EA is the place to go. Download: Oracle 12c Multitenant Self Provisioning Application -BETA- The -BETA- is here. The Multitenant self provisioning Application is an easy and productive way for DBAs and Developers to get familiar with powerful PDB features including create, clone, plug and unplug.   No better time to start playing with PDBs. Oracle 12c Multitenant Self Provisioning Application. Download: New! Updates to Oracle Data Integration Portfolio Oracle GoldenGate 12c and Oracle Data Integrator 12c is now available. From Real-Time data integration, transactional change data capture, data replication, transformations....to hi-volume, high-performance batch loads, event-driven, trickle-feed integration process..its now available. Go here all the details and links to downloads...and Congratulations Data Integration Team!. Download: Oracle VM Templates for Oracle 12c Features Support for Single Instance, Oracle Restart and Oracle RAC Support for all current Oracle Database 11.2 versions as well as Oracle 12c on Oracle Linux 5 Update 9 & Oracle Linux 6 Update 4. The Oracle 12c templates allow end-to-end automation for Flex Cluster, Flex ASM and PDBs. See how the Deploycluster tool was updated to support Single Instance and the new Oracle 12c features. Oracle VM Templates for Oracle Database. Download: Oracle SQL Developer Data Modeler 4.0 EA 3 If you're looking for a datamodeling and database design tool that provides an environment for capturing, modeling, managing and exploiting metadata, it's time to check out Oracle SQL Developer Data Modeler. Oracle SQL Developer Data Modeler 4.0 EA V3 is here.

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  • Suggestions for programming language and database for a high end database querying system (>50 milli

    - by mmdave
    These requirements are sketchy at the moment, but will appreciate any insights. We are exploring what would be required to build a system that can handle 50 database million queries a day - specifiically from the programming language and database choice Its not a typical website, but an API / database accessing through the internet. Speed is critical. The application will primarily receive these inputs (about a few kb each) and will have to address each of them via the database lookup. Only a few kb will be returned. The server will be run over https/ssl.

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  • Instructor Insight: Using the Container Database in Oracle Database 12 c

    - by Breanne Cooley
    The first time I examined the Oracle Database 12c architecture, I wasn’t quite sure what I thought about the Container Database (CDB). In the current release of the Oracle RDBMS, the administrator now has a choice of whether or not to employ a CDB. Bundling Databases Inside One Container In today’s IT industry, consolidation is a common challenge. With potentially hundreds of databases to manage and maintain, an administrator will require a great deal of time and resources to upgrade and patch software. Why not consider deploying a container database to streamline this activity? By “bundling” several databases together inside one container, in the form of a pluggable database, we can save on overhead process resources and CPU time. Furthermore, we can reduce the human effort required for periodically patching and maintaining the software. Minimizing Storage Most IT professionals understand the concept of storage, as in solid state or non-rotating. Let’s take one-to-many databases and “plug” them into ONE designated container database. We can minimize many redundant pieces that would otherwise require separate storage and architecture, as was the case in previous releases of the Oracle RDBMS. The data dictionary can be housed and shared in one CDB, with individual metadata content for each pluggable database. We also won’t need as many background processes either, thus reducing the overhead cost of the CPU resource. Improve Security Levels within Each Pluggable Database  We can now segregate the CDB-administrator role from that of the pluggable-database administrator as well, achieving improved security levels within each pluggable database and within the CDB. And if the administrator chooses to use the non-CDB architecture, everything is backwards compatible, too.  The bottom line: it's a good idea to at least consider using a CDB. -Christopher Andrews, Senior Principal Instructor, Oracle University

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  • Oracle Database Appliance Setup Poster Updated

    - by Ravi.Sharma
    The newly updated Setup Poster for Oracle Database Appliance is now available at http://wd0338.oracle.com/archive/cd_ns/E22693_01/index.htm This updated poster is a comprehensive source of information for anyone planning to deploy Oracle Database Appliance. It includes two main sections (which are conveniently printed on the two sides of a single 11x17 page) 1. Preparing to Deploy Oracle Database Appliance2. Oracle Database Appliance Setup The Preparing to Deploy Oracle Database Appliance section provides a concise list of items to plan for and review before beginning deployment. This includes registering Support Identifiers, allocating IP addresses, downloading software and patches, choosing configuration options, as well as important links to useful information. The Oracle Database Appliance Setup section provides a step by step procedure for deploying and configuring Oracle Database Appliance. This includes initial powering up of Oracle Database Appliance, configuring initial network, downloading software and completing the configuration using Oracle Database Appliance Configurator (GUI)  

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  • Oracle Database Machine and Exadata Storage Server

    - by jean-marc.gaudron(at)oracle.com
    Master Note for Oracle Database Machine and Exadata Storage Server (Doc ID 1187674.1)This Master Note is intended to provide an index and references to the most frequently used My Oracle Support Notes with respect to Oracle Exadata and Oracle Database Machine environments. This Master Note is subdivided into categories to allow for easy access and reference to notes that are applicable to your area of interest. This includes the following categories: • Database Machine and Exadata Storage Server Concepts and Overview• Database Machine and Exadata Storage Server Configuration and Administration• Database Machine and Exadata Storage Server Troubleshooting and Debugging• Database Machine and Exadata Storage Server Best Practices• Database Machine and Exadata Storage Server Patching• Database Machine and Exadata Storage Server Documentation and References• Database Machine and Exadata Storage Server Known Problems• ASM and RAC Documentation• Using My Oracle Support Effectively

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  • What is the best database for my needs?

    - by Mr. Flibble
    I am currently using MS SQL Server 2008 but I'm not sure it it is the best system for this particular task. I have a single table like so: PK_ptA PK_ptB DateInserted LookupColA LookupColB ... LookupColF DataCol (ntext) A common query is SELECT TOP(1000000) DataCol FROM table WHERE LookupColA=x AND LookupColD=y AND LookupColE=z ORDER BY DateInserted DESC The table has about a billion rows with 5 million inserted per day. My main problem with SQL Server is that it isn't too easy to shard or spread out the datafiles. Also, exporting seems to max out at 1000rows per second (about 1MB/s) which seems very slow. Another problem I have is, with SQL Server, if I want to add a new LookupCol the log file grows enormously requiring a large amount of rarely used free space on tap. Are there any obvious better solutions for this problem?

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  • Oracle Announces General Availability of Oracle Database 12c, the First Database Designed for the Cloud

    - by Javier Puerta
    Oracle Announces General Availability of Oracle Database 12c, the First Database Designed for the Cloud REDWOOD SHORES, Calif. – July 1, 2013 News Summary As organizations embrace the cloud, they seek technologies that will transform business and improve their overall operational agility and effectiveness. Oracle Database 12c is a next-generation database designed to meet these needs, providing a new multitenant architecture on top of a fast, scalable, reliable, and secure database platform. By plugging into the cloud with Oracle Database 12c, customers can improve the quality and performance of applications, save time with maximum availability architecture and storage management and simplify database consolidation by managing hundreds of databases as one. Read full press release

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  • Oracle Announces General Availability of Oracle Database 12c, the First Database Designed for the Cloud

    - by Javier Puerta
    Oracle Announces General Availability of Oracle Database 12c, the First Database Designed for the Cloud REDWOOD SHORES, Calif. – July 1, 2013 News Summary As organizations embrace the cloud, they seek technologies that will transform business and improve their overall operational agility and effectiveness. Oracle Database 12c is a next-generation database designed to meet these needs, providing a new multitenant architecture on top of a fast, scalable, reliable, and secure database platform. By plugging into the cloud with Oracle Database 12c, customers can improve the quality and performance of applications, save time with maximum availability architecture and storage management and simplify database consolidation by managing hundreds of databases as one. Read full press release  

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  • Single value data to multiple values of data in database relation

    - by Sofiane Merah
    I have such a hard time picturing this. I just don't have the brain to do it. I have a table called reports. --------------------------------------------- | report_id | set_of_bads | field1 | field2 | --------------------------------------------- | 123 | set1 | qwe | qwe | --------------------------------------------- | 321 | 123112 | ewq | ewq | --------------------------------------------- I have another table called bads. This table contains a list of bad data. ------------------------------------- | bad_id | set_it_belongs_to | field2 | field3 | ------------------------------------- | 1 | set1 | qwe | qwe | ------------------------------------- | 2 | set1 | qee | tte | ------------------------------------- | 3 | set1 | q44w | 3qwe | ------------------------------------- | 4 | 234 | qoow | 3qwe | ------------------------------------- Now I have set the first field of every table as the primary key. My question is, how do I connect the field set_of_bads to set_it_belongs_to in the bads table. This way if I want to get the entire set of data that is set1 by calling on the reports table I can do it. Example: hey reports table.. bring up the row that has the report_id 123. Okay thank you.. Now get all the rows from bads that has the set_of_bads value from the row with the report_id 123. Thanks.

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  • Is it a bad practice to store large files (10 MB) in a database?

    - by B Seven
    I am currently creating a web application that allows users to store and share files, 1 MB - 10 MB in size. It seems to me that storing the files in a database will significantly slow down database access. Is this a valid concern? Is it better to store the files in the file system and save the file name and path in the database? Are there any best practices related to storing files when working with a database? I am working in PHP and MySQL for this project, but is the issue the same for most environments (Ruby on Rails, PHP, .NET) and databases (MySQL, PostgreSQL).

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  • Tables as relations in ER diagrams

    - by Richard Mar.
    Assume I have the following tables (**bold** - primary key, *italics* - foreign key): patient(**patient_id**, name) disease(**disease_id**, name) patient_disease(**p_d_id**, *patient_id*, *disease,_id* ) I want to draw the ER diagram for this. My idea is to make two entities, one for patient and one for disease, then make a n-to-n relation between them, with p_d_id as its attribute. Is that how it's supposed to be?

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  • ????????!Oracle Database 12c ??????????

    - by OTN-J Master
    ??????Oracle Database 12c ?????????????¦Oracle Database 12c ???????????????????????????????????c???cloud???????????????????????????????????????????????????????????????????????????????????????1????????????????????????????????????2????????????1????????????IT??????????????????????????????????????????????????????????1???????????????????????????????????????????????????Oracle Databae 12c ????????????????????????·??????????????????????????????????????????·??????????????????????????????????? Oracle Database 12c ?????? >>>>>>Oracle??????? Oracle Database 12c [????] >>>>>>OTN????? Oracle Database 12c [????] >>>>>>Oracle Database New Features Guide 12c Release1(??) [PDF?] [HTML?] ¦OTN???????????????????????????????????????????????Oracle Database 12c ?????????????????????????????????????????????????????????    1) ??????????????????     2) ??????(????)???????????    3) ???????????(??)?????????????    4) Oracle Databse 12c ????????????????????????????????????????????OTN?????????????Oracle Database 12c ??????????????????OTN?????????????????????OTN????RSS???OTN Twitter?????????????????????????????Oracle Database 12c???????????????

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  • Effective backup and archive strategy for database and linked files

    - by busyspin
    I am using Postgres to store a variety of application data for a webapp. Part of the application involves storing and retrieving user uploaded files. I am storing the files in the filesystem with some associated metadata in the database. I am trying to come up with a backup and archive strategy so that I can effectively backup and archive/restore the database and the linked files. Here are the things I want to accomplish. Perform routine backups that can be used for recovery from failures and which include all DB data and the linked files. Ideally, this backup would be done while the app is running. Live backup is certainly possible with a DB but I am not sure how to keep the linked files consistent with the database during the backup process Archive chunks of data as they become "old". These chunks must includes the database data plus any linked files. It should be possible to put the archived data back into production again. It would be ideal if it were easy to determine which ranges of objects were stored in each chunk. Do you have any advice for how to accomplish these goals? If the files were in the database as BLOBS these tasks would be much easier since normal database backup and restore functionality would handle this. I am not sure how to accomplish the same thing when file data is linked to database rows.

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  • active record relations – who needs it?

    - by M2_
    Well, I`m confused about rails queries. For example: Affiche belongs_to :place Place has_many :affiches We can do this now: @affiches = Affiche.all( :joins => :place ) or @affiches = Affiche.all( :include => :place ) and we will get a lot of extra SELECTs, if there are many affiches: Place Load (0.2ms) SELECT "places".* FROM "places" WHERE "places"."id" = 3 LIMIT 1 Place Load (0.3ms) SELECT "places".* FROM "places" WHERE "places"."id" = 3 LIMIT 1 Place Load (0.8ms) SELECT "places".* FROM "places" WHERE "places"."id" = 444 LIMIT 1 Place Load (1.0ms) SELECT "places".* FROM "places" WHERE "places"."id" = 222 LIMIT 1 ...and so on... And (sic!) with :joins used every SELECT is doubled! Technically we cloud just write like this: @affiches = Affiche.all( ) and the result is totally the same! (Because we have relations declared). The wayout of keeping all data in one query is removing the relations and writing a big string with "LEFT OUTER JOIN", but still there is a problem of grouping data in multy-dimentional array and a problem of similar column names, such as id. What is done wrong? Or what am I doing wrong? UPDATE: Well, i have that string Place Load (2.5ms) SELECT "places".* FROM "places" WHERE ("places"."id" IN (3,444,222,57,663,32,154,20)) and a list of selects one by one id. Strange, but I get these separate selects when I`m doing this in each scope: <%= link_to a.place.name, **a.place**( :id => a.place.friendly_id ) %> the marked a.place is the spot, that produces these extra queries.

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  • ???????/??????????!? Oracle?? ?????

    - by Yusuke.Yamamoto
    ????? ??:2010/12/01 ??:??????/?? ???? Oracle Database ???????????????????Oracle Database ??????????????????????????? Oracle Database ?????! Oracle Database ???/ Oracle Database ???Oracle Database ?????Oracle Database ????????????:??????·???/??????·???????????????????Oracle Database ???????/ ??????????????????????/??????????????????????????????????????????????? ????????? ????????????????? http://otndnld.oracle.co.jp/ondemand/otn-seminar/movie/Nyumon12011100.wmv http://www.oracle.com/technology/global/jp/ondemand/otn-seminar/pdf/20101201_Oracle_Beginner.pdf

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  • ???????/??????????!? Oracle?? ??????????

    - by Yusuke.Yamamoto
    ????? ??:2010/12/08 ??:??????/?? ???? Oracle Database ??????????????????????????? Oracle Database ????????????Oracle Database ??????????????????????????????????????? Oracle Database ???/ Oracle Database ??????Oracle Database ???????Oracle Database ???/ ????????????Oracle Database ???????(??)/ ???????????????????????????????????? ????????? ????????????????? http://otndnld.oracle.co.jp/ondemand/otn-seminar/movie/Nyumon12081100.wmv http://www.oracle.com/technology/global/jp/ondemand/otn-seminar/pdf/1208_1100_Oracle_Beginner_architecture.pdf

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  • Sqlite Database LEAK FOUND exception in android?

    - by androidbase
    hi all, i am getting this exception in database Leak Found my LOGCAT Shows this: 02-17 17:20:37.857: INFO/ActivityManager(58): Starting activity: Intent { cmp=com.example.brown/.Bru_Bears_Womens_View (has extras) } 02-17 17:20:38.477: DEBUG/dalvikvm(434): GC freed 1086 objects / 63888 bytes in 119ms 02-17 17:20:38.556: ERROR/Database(434): Leak found 02-17 17:20:38.556: ERROR/Database(434): java.lang.IllegalStateException: /data/data/com.example.brown/databases/BRUNEWS_DB_01.db SQLiteDatabase created and never closed 02-17 17:20:38.556: ERROR/Database(434): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1694) 02-17 17:20:38.556: ERROR/Database(434): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:738) 02-17 17:20:38.556: ERROR/Database(434): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:760) 02-17 17:20:38.556: ERROR/Database(434): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:753) 02-17 17:20:38.556: ERROR/Database(434): at android.app.ApplicationContext.openOrCreateDatabase(ApplicationContext.java:473) 02-17 17:20:38.556: ERROR/Database(434): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:193) 02-17 17:20:38.556: ERROR/Database(434): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98) 02-17 17:20:38.556: ERROR/Database(434): at com.example.brown.Brown_Splash.onCreate(Brown_Splash.java:52) 02-17 17:20:38.556: ERROR/Database(434): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 02-17 17:20:38.556: ERROR/Database(434): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459) 02-17 17:20:38.556: ERROR/Database(434): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 02-17 17:20:38.556: ERROR/Database(434): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 02-17 17:20:38.556: ERROR/Database(434): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 02-17 17:20:38.556: ERROR/Database(434): at android.os.Handler.dispatchMessage(Handler.java:99) 02-17 17:20:38.556: ERROR/Database(434): at android.os.Looper.loop(Looper.java:123) 02-17 17:20:38.556: ERROR/Database(434): at android.app.ActivityThread.main(ActivityThread.java:4363) 02-17 17:20:38.556: ERROR/Database(434): at java.lang.reflect.Method.invokeNative(Native Method) 02-17 17:20:38.556: ERROR/Database(434): at java.lang.reflect.Method.invoke(Method.java:521) 02-17 17:20:38.556: ERROR/Database(434): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 02-17 17:20:38.556: ERROR/Database(434): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 02-17 17:20:38.556: ERROR/Database(434): at dalvik.system.NativeStart.main(Native Method) how can i solve it??? thanks in advance...

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  • Distributed Database Services?

    - by Cameron
    I'm working on a database-driven web service with clients in the US and Australia. We're currently hosted in the US, however our Australian clients are experiencing lag. The lag is primarily due to the fact that the pages launch AJAX queries which require some db work to be done on our database in the US and these take a while to perform a round trip. Ideally, we're looking for some kind of distributed database system which replicates our main US database in Australia (and possibly other locations if we choose to expand later on). Does anyone have any suggestions for services which offer something like this? Something like a CDN (CacheFly etc), which is web-based, simple to set up etc but for databases instead of static files. Ideally it would be completely transparent to the application and abstract away all the distributed database management, syncs etc.

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  • SQL SERVER – DBA or DBD? – Database Administrator or Database Developer

    - by pinaldave
    Earlier this month, I had poll on this blog where I asked question – Are you a Database Administrator or Database Developer? The word DBA (Database Administrator) is very common but DBD (Database Developer) is not common at all. This made me think – what is the ratio of the same. Here the result of the poll: Database Administrator 36.6% (254 votes) Database Developer 63.4% (440 votes) Total Votes: 694 This is open poll, if you want you can still participate here. Vote your Voice – DBD or DBA? I think it is the time when DBD word for Database Developer gets place in our dictionary. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Database, DBA, Pinal Dave, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLServer, T SQL, Technology

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  • Oracle Database 12c is available for download now!

    - by Mike Dietrich
    Good things come to those who wait ... finally ... Oracle Database 12c (Oracle 12.1.0.1) is available for download from the Oracle Software Cloud (formerly know as eDelivery) and OTN (Oracle Tech Network) for Linux 64bit (Solaris will follow within the next few hours): eDelivery:Oracle Database 12c (12.1.0.1) for Linux 64bitOracle Database 12c (12.1.0.1) for Solaris SPARC64Oracle Database 12c (12.1.0.1) for Solaris x86. OTN:Oracle Database 12c (12.1.0.1) for Linux 64bitOracle Database 12c (12.1.0.1) for Solaris SPARC64Oracle Database 12c (12.1.0.1) for Solaris x86  . And yes, it will be supported on Oracle Exadata and SuperCluster as well . . And with the release of Oracle Database 12c we are offering you also our NEWUpgrade, Migrate and Consolidate to Oracle Database 12cslide deck with (sorry, we've did it again!) over 500 slides covering: The brand new Parallel Upgrade including new Pre/Post-Upgrade-Fix-Ups The new Full Transportable Export/Import Feature Obviously Oracle Multitenant, which got talked about a lot as Pluggable Databases or Container Databases before Plenty of new parameters, cool and very helpful features and much more ... Download the slides Upgrade, Migrate and Consolidate to Oracle Database 12c And of course, the slide deck will see some updates in the near future -Mike . .

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