sql事务的运用

set @errorSum =0 --初始化为0，即无错误
begin transaction
begin

set @errorSum=@errorSum+@@ERROR
if(@errorSum>0)
rollback transaction
else
commit transaction --提交回滚事务
end

BEGIN TRANSACTION
BEGIN TRY

IF EXISTS(SELECT 1 FROM #temp GROUP BY productID HAVING COUNT(1)>1)
BEGIN
SET @str=@str+‘对应的产品信息存在多行，请检查’
SELECT @str
ROLLBACK
RETURN
END

COMMIT TRAN
SELECT ‘’

END TRY
BEGIN CATCH
	ROLLBACK TRAN
	SELECT ERROR_MESSAGE()
END CATCH