正确使用 SQL Server 中的事务

Correct use of transactions in SQL Server(正确使用 SQL Server 中的事务)

问题描述

我有 2 个命令，需要它们都正确执行或都不执行.所以我觉得我需要一个事务，但我不知道如何正确使用它.

I have 2 commands and need both of them executed correctly or none of them executed. So I think I need a transaction, but I don't know how to use it correctly.

下面的脚本有什么问题?

What's the problem with the following script?

BEGIN TRANSACTION [Tran1]

INSERT INTO [Test].[dbo].[T1]
    ([Title], [AVG])
VALUES ('Tidd130', 130), ('Tidd230', 230)

UPDATE [Test].[dbo].[T1]
  SET [Title] = N'az2' ,[AVG] = 1
  WHERE [dbo].[T1].[Title] = N'az'

COMMIT TRANSACTION [Tran1]
GO

INSERT命令执行了，但是UPDATE命令有问题.

The INSERT command is executed, but the UPDATE command has a problem.

如果其中任何一个命令在执行时出错，我如何实现它以回滚这两个命令?

How can I implement this to rollback both commands if any of them have an error in execution?

推荐答案

添加一个 try/catch 块，如果事务成功则提交更改，如果事务失败则回滚事务:

Add a try/catch block, if the transaction succeeds it will commit the changes, if the transaction fails the transaction is rolled back:

BEGIN TRANSACTION [Tran1]

  BEGIN TRY

      INSERT INTO [Test].[dbo].[T1] ([Title], [AVG])
      VALUES ('Tidd130', 130), ('Tidd230', 230)

      UPDATE [Test].[dbo].[T1]
      SET [Title] = N'az2' ,[AVG] = 1
      WHERE [dbo].[T1].[Title] = N'az'

      COMMIT TRANSACTION [Tran1]

  END TRY

  BEGIN CATCH

      ROLLBACK TRANSACTION [Tran1]

  END CATCH  

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