一個存儲過程中多個更新操作，后面的更新操作出現異常，如果不手動回滾前面修改的數據是不會自動撤銷的！

BEGIN TRY    BEGIN TRAN-- .....    COMMIT TRANEND TRYBEGIN CATCH    ROLLBACK TRAN    DECLARE @ErrorMessag NVARCHAR(255)    SELECT @ErrorMessag = Error_message()    RAISERROR (15600,-1,-1,@ErrorMessag);END CATCH

另參考：http://msdn.microsoft.com/zh-cn/library/ms178592.aspx

BEGIN TRY    -- RAISERROR with severity 11-19 will cause execution to     -- jump to the CATCH block.    RAISERROR ('Error raised in TRY block.', -- Message text.               16, -- Severity.               1 -- State.               );END TRYBEGIN CATCH    DECLARE @ErrorMessage NVARCHAR(4000);    DECLARE @ErrorSeverity INT;    DECLARE @ErrorState INT;    SELECT         @ErrorMessage = ERROR_MESSAGE(),        @ErrorSeverity = ERROR_SEVERITY(),        @ErrorState = ERROR_STATE();    -- Use RAISERROR inside the CATCH block to return error    -- information about the original error that caused    -- execution to jump to the CATCH block.    RAISERROR (@ErrorMessage, -- Message text.               @ErrorSeverity, -- Severity.               @ErrorState -- State.               );END CATCH;