@@ERROR 变量

如果这样用

UPDATE Accounts SET Balance = Balance + @Amount WHERE AccountID = @ID_A
IF (@@ERROR > 0)
    GOTO PROBLEM

需要注意：

When using the @@ERROR value in Transact-SQL, you must be careful to
check it immediately after each operation. That’s because @@ERROR is reset to 0 when a successful
SQL statement is completed.