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• Use '=' or LIKE to compare strings in SQL?

  - by furtelwart

  Hi! There's the (almost religious) discussion, if you should use LIKE or '=' to compare strings in SQL statements. Are there reasons to use LIKE? Are there reasons to use '='? Performance? Readability? Thanks in advance!

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• LINQ timed out while the same query works great in SQL

  - by oshafran

  Hi I am getting Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.Data.SqlClient.SqlException (0x80131904): Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. When I run the SAME query in the SQL query program I get result within seconds, and in LINQ it takes forever and fails. What can cause this??? Thanks!

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• SQL : Select a dynamic number of rows as columns

  - by Clint

  I need to select static colums + a dynamic number of rows as columns in SQL TABLE 1 ------- HotelID BlockID BlockName TABLE 2 ------- BlockDate (unknown number of these) NumberOfRooms Desired Result Row ------------------ HotelID | BlockID | BlockName | 02/10/10 | 02/11/10 | 02/12/10 | ...N Where the date columns are the unknown number of BlockDate rows.

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• The order of a SQL Select statement without Order By clause

  - by Yousui

  As I know, from the relational database theory, a select statement without an order by clause should be considered has not particular order. But actually in SQL Server and Oracle (I've tested on those 2 platforms), if I query from a table without an order by clause multiple times, I always get the results in the same order. Does this behavior can be relied on? Anyone can help to explain a little? Thanks!

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• How can I Duplicate a MSSQL Symmetric Key?

  - by rlb.usa

  We have a server with a database that has a symmetric key (Database - Security - Symmetric Key). We have a backup duplicate databases that we are using as a test databases, but we don't have this key in there. How can I duplicate this symmetric key (or make a new one exactly like the old) and put it in the existing databases? It has to have the same value and key-name as the other one. This is on MS SQL Server (edit) 2008 .

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• Multiple Language (English, Dutch, Finnish, French, Hungarian, Bangla, Italian,) in ASP.NET with SQL

  - by Nahid

  I am developing a web Application in ASP.NET 3.5 with SQL Server 2008. I need Multiple Language such as English, Dutch, Finnish etc. I can do it by using System.Resources and System.Globalization. but I can't convert the Language which data come from database. How can I solve it ???

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• simpledb, sql azure, mysql + memcached

  - by sirmak

  For a new scalable high traffic global ecommerce website (asp.net) project which technology fits best (max. scalability & performance, min. price & maintenance)? amazon simpledb, microsoft sql azure, mysql + memcached combo, or your solution...

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• How Can I do this??

  - by ramadan2050

  I have a table records(ID, ParentID) containg this data ID ParentID 1 null 2 1 3 2 3 4 4 5 6 null 7 6 If you draw this table in hierarchy as a family 1,2,3,4,5 will be related to each other. I want to find a way, where I can pass an ID like 3 it give me the others family members using SQL or using C# 3 - result 1,2,4,5 2 - result 1,3,4,5 6 - result 7 and so on I want to find my parent and his parents and childs and my child and his childs LIKE THE EXAMPLES

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• INNER JOIN Returns Too Many Results

  - by Alon

  I have the following SQL: SELECT * FROM [Database].dbo.[TagsPerItem] INNER JOIN [Database].dbo.[Tag] ON [Tag].Id = [TagsPerItem].TagId WHERE [Tag].Name IN ('home', 'car') and it returns: Id TagId ItemId ItemTable Id Name SiteId 1 1 1 Content 1 home 1 2 1 2 Content 1 home 1 3 1 3 Content 1 home 1 4 2 4 Content 2 car 1 5 2 5 Content 2 car 1 6 2 12 Content 2 car 1 instead of just two records, which these names are "home" and "car". How can I fix it? Thanks.

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• Subsonic 2.2 and SQL CE

  - by Giuseppe

  Hi, anybody use Subsonic with SQL Server CE 3.5 ? I try but get an error with Substage 2.2, error talking about PK_TABLE. My tables have primary keys and relations. Can someone help me ? By, Giuseppe.

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• SQL Code Smells

  - by Lijo

  Hi Team, Could you please list some of the bad practices in SQL, that novice people do? I have found the use of "WHILE loop" in scenarios which could be resolved using set operations. Another example is inserting data only if it does not exist. This can be achieved using LEFT OUTER JOIN. Some people go for "IF" Any other thoughts? Thanks Lijo

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• C# SQL Data Adapter System.Data.StrongTypingException

  - by René

  I get my data from SQL to Dataset with Fill. It's just one table with two columns (CategoryId (int) and CategoryName (varchar)). When I look at my dataset after fill method, CategoryId Columns seems to be correct. But in the CategoryName I have a *System.Data.StrongTypingExceptio*n. What could that mean? Any Ideas?

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• How to show hierarchial data in a dropdownlist.

  - by vaibhav

  I have a table in sqlserver 2005. I want to show all domain name in a dropdownlist maintaing the same hierarchy. i.e Law Engineering --civil --Mechanical Medical --Dental ----Cavity --MBBS I need to append '--' according to the domain level. Is it possible using a sql query. or alternatively can I have any other control to show this data.

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• How to create a table type in Sql Server 2005

  - by Nikola Stjelja

  Hi, I'm trying to create a table type in sql server 2005. Here is what my code looks like: CREATE TYPE NameResourceType AS TABLE ( ID int, [Value] Varchar(256) ) GO I receive the following error: Incorrect syntax near the keyword 'AS'.

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• XKCD SQL injection - please explain

  - by Blankman

  Just looking at: What does this SQL do: Robert'); DROP TABLE STUDENTS; -- I know both ' and -- are for comments, but doesn't the word DROP get commented as well since it is part of the same line?

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• Exporting SQL Server Databases for offline use

  - by WedTM

  I have a desktop application (C# .NET 3.5) that uses a SQL server for it's database. I have had a request from the client, however, to make it possible to export the database as it stands, and be able to use it on a laptop without connectivity. They understand that updates to the parent server will not be reflected in these offline clients. Is there a way I can just save the DataSet's to a binary form and write them to a disk and send those files to the offline clients.

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• sql 2008 express connection problems

  - by user163457

  Hi, I've just installed a fresh copy of SQL 2008 Express. before I did anything I opened Management Studio and successfully connected using Window Authentication. However I tried to run the following on the command line "telnet localhost 1433" and got the error "Could not open connection to the host, on port 1433: Connect failed" I checked netstat and there is nothing listening on port 1433. Before I go any further, is there a problem with the install? thanks, Shane

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• What are naming conventions for SQL Server ?

  - by newbie

  I need to create database for SQL Server, what kind of naming convention I sohuld use? 1) Table names could be : customer, Customer, CUSTOMER 2) Field names could be : customer_id, CustomerId, CustomerID, CUSTOMER_ID, customerid, CUSTOMERID and so on... Is there any official suggestion for naming conventions or what is msot common way to name tables and fields?

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• PostgreSQL or MS SQL Server?

  - by mmiika

  I'm considering using PostgreSQL with a .Net web app. Basically 3 reasons: Mature Geo Queries Small footprint + Linux Price I'm wondering a bit about tools though, SQL Server Profiler and query plans and performance monitors have been helpful. How is this world with Postgres? Some other things I should consider? Edit: Will most likely use NHibernate as ORM

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• How to migrate the Access database to MOSS 2007 sql server with the use of SSMA (sql server migratio

  - by pointlesspolitics

  Hi, One of my friends got the access database with Forms (VBA) and wish to migrate all the database table to the newly installed MOSS 2007 site. He is using SSMI for this purpose. He cannot do it because there are plenty of errors and warnings. I think it is due to the old Access queries. Is there any other way to import the database to sql 2005 from access ? Thanks

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• Refactoring SQL

  - by Mongus Pong

  Are there any formal techniques for refactoring SQL similar to this list here that is for code? I am currently working on a massive query for a particular report and I'm sure there's plenty of scope for refactoring here which I'm just stumbling through myself bit by bit.

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• Linq to Sql get SqlCommand when stored procedure execution fails

  - by Tim Mahy

  Hi all, currently I'm assigning a TextWriter to the Log property of my Linq to Sql data context (per request instancing) and write this to my logging when an exception is thrown while executing a stored procedure (is strongly typed mapped in the context, so not executing a custom command) however when using ADO.NET we normally inspect the SqlCommand upon unhandled exception to read out the parameters and log them is it possible to access the SqlCommand that was used for executing a Stored Procedure in L2S so we can reuse that existing logging component? This would be far nicer than the current Log TextWriter solution.... greetings, Tim

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• Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID

  - by Jian Lin

  Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID); ? The ( ) usually is for specifying grouping of something. But in this case, are we supposed to be able to use 2 or more field names... in the example above, it can be all clear that it is 1 field, is it just that the parser is not made to bypass the ( ) when it is all clear? (such as in the language Ruby).

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• SQL Server 2005 Performance Dashboard Missing Index

  - by n8wrl

  I am using the performance dashboard with our SQL Server 2005 databases and it lists what it considers to be missing indexes. But some of those indexes DO exist! They are not disabled, and they are defined exactly as the dashboard says they should be. Why are they reported as missing?

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• Sql query Error: Operand should contain 1 column(s) in rails

  - by dombesz

  Hi everyone, SELECT * FROM jobs WHERE (SELECT DISTINCT jobs.* FROM jobs, job_requests WHERE (jobs.user_id = 1) OR (job_requests.user_id = 1 AND job_requests.job_id = jobs.id)) This sql gives me Mysql::Error: Operand should contain 1 column(s). If i execute the select from the where clause it works SELECT DISTINCT jobs.* FROM jobs, job_requests WHERE (jobs.user_id = 1) OR (job_requests.user_id = 1 AND job_requests.job_id = jobs.id) Could somebody explain me why? This query is generated by rails activerecord so the main select is needed.

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