Question

我在SQL Server中有两个日期 - [O/R COMPLETE DATE]和[O/R SHIP BY]。我想检查[O/R COMPLETE DATE]是否晚于[O/R SHIP BY]，如果是，我想显示一条消息Overwrite shipBy date must be later than Overwrite Completed date。

有可能吗？

Answer 1

这个怎么样？

    CREATE TABLE OVERWRITE
        (OVERWRITEID int
        ,[O/R COMPLETE DATE] date
        ,[O/R SHIP BY] date
        ,[SHIP INSTRUCTIONS] AS 
            CASE WHEN [O/R COMPLETE DATE] > [O/R SHIP BY] 
                 THEN 'Overwrite shipBy date must be later than Overwrite Completed date' 
              ELSE 
                'Overwrite shipBy date and Overwrite Completed dates are valid' 
            END
        )


    INSERT INTO OVERWRITE
    VALUES (1,'1/1/2017', '6/1/2017'), (2, '11/1/2017', '10/1/2017')

    SELECT *
    FROM OVERWRITE

触发器不是为输出而设计的;如前所述，建议客户端应用程序发送消息。数据库中坏数据的第一道防线是前端应用程序。

http://sqlfiddle.com/#!6/4f0d0/1

使用SQL Server触发器打印消息

1 个答案: