@@error Sql Server 2000 Example
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Sql Server 2000 Tutorial
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Membership My Profile People Subscriptions My stuff Preferences Send a message Log Out Data Management Understanding error handling in SQL Server 2000 Transaction design and error handling in SQL Server 2000 is no easy task. Tim sql server 2000 sample databases Chapman provides insight into designing transactions and offers a few tips to help you develop custom error handling routines for your applications. By Tim Chapman | June 5, 2006, 12:00 AM PST RSS Comments Facebook Linkedin Twitter More Email Print Reddit Delicious Digg Pinterest Stumbleupon Google Plus Most iterative language compilers have built-in error handling routines (e.g., TRY…CATCH statements) that developers can leverage when designing their code. Although SQL Server 2000 sql server 2000 tutorial for beginners developers don't enjoy the luxury that iterative language developers do when it comes to built-in tools, they can use the @@ERROR system variable to design their own effective error-handling tools. Introducing transactions In order to grasp how error handling works in SQL Server 2000, you must first understand the concept of a database transaction. In database terms, a transaction is a series of statements that occur as a single unit of work. To illustrate, suppose you have three statements that you need to execute. The transaction can be designed in such a way so that all three statements occur successfully, or none of them occur at all. When data manipulation operations are performed in SQL Server, the operation takes place in buffer memory and not immediately to the physical table. Later, when the CHECKPOINT process is run by SQL Server, the committed changes are written to disk. This means that when transactions are occurring, the changes are not made to disk during the transaction, and are never written to disk until committed. Long-running transactions require more processing memory and require that the database hold locks for a longer period of time. Thus, you must be careful when designing long running transactions in a production environment. Here's a good example of how using transacti
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Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it http://www.techrepublic.com/article/understanding-error-handling-in-sql-server-2000/ only takes a minute: Sign up Proper use of @@Error in SQL Server 2000 up vote 2 down vote favorite Taking any example for SQL Server 2000 documentation, or something like Use Northwind Go Alter Procedure spu_UpdateOrderDetails( @ProductID Int, @OrderId Int, @ErrorCode Int OutPut, @ErrorMessage Varchar(100) Output ) As UPDATE [Order Details] SET ProductID = @ProductID WHERE OrderID = @OrderId Set http://stackoverflow.com/questions/10858472/proper-use-of-error-in-sql-server-2000 @ErrorCode = @@ERROR IF @ErrorCode <> 0 Set @ErrorMessage = 'Some error ocurred' GO Declare @MyErrorCode Int Declare @MyErrorMsg Varchar(100) Exec spu_UpdateOrderDetails 999, 10248, @MyErrorCode OutPut, @MyErrorMsg OutPut Print @MyErrorCode Print @MyErrorMsg This will cause a Foreign Key error, and I wll print the @MyErrorMsg properly. But I still get the ugly Foreign Key error. Now, if I run from within my application, it could be Delphi or Visual Studio, I still get the ugly error message, too. How am I supposed to "trap" an error, so that I show my custom error to the user? (I know newer SQL Server versions provides Try/Catch, but this is SQL Server 2000) sql-server sql-server-2000 share|improve this question asked Jun 1 '12 at 23:17 Craig Stevensson 59611033 2 Read the Bible on SQL Server 2000 error handling and see if it helps: sommarskog.se/error-handling-I.html#whathappens –mellamokb Jun 1 '12 at 23:21 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote Put it in a transaction, and roll it back it if errors, commit if success: SET QUOTED_IDENTIFIER
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