有哪些方法可以确保mysql事务成功完成？

Question

假设你有3个相关的表，你必须做3个mysql查询来插入/更新它的值。如果其中一个失败或插入了一个不合适的值，有没有办法撤消/回滚事务或设置一些约束规则，或者你总是要自己检查每个？

Answer 1

使用以下代码，您可以执行任何查询..但如果一个错误，则查询将被回滚。

BEGIN TRANSACTION
BEGIN TRY

    //do every query you need. if one errors it everything is off.

    COMMIT TRANSACTION
END TRY
BEGIN CATCH
   SELECT 
       ERROR_NUMBER() AS ErrorNumber,
       ERROR_SEVERITY() AS ErrorSeverity,
       ERROR_STATE() AS ErrorState,
       ERROR_PROCEDURE() AS ErrorProcedure,
       ERROR_LINE() AS ErrorLine,
       ERROR_MESSAGE() AS ErrorMessage

   ROLLBACK TRANSACTION
END CATCH