sql-server - SQL Server , 插入触发器

Question

recid  | EffectiveFrom | EffectiveTo
------------------------------------
   1   | 2012-11-25    | 2012-11-30
   2   | 2012-11-26    | null

我需要一个触发器来检查新日期是否介于effectivefrom和之间effectiveTo 并停止插入..

Answer 1

尝试这个 ：

USE {yourDB}; 

CREATE TRIGGER insertRecord ON {tblName}
INSTEAD OF INSERT
AS
BEGIN
    DECLARE @EffectiveFrom DATE;
    DECLARE @EffectiveTo DATE;
    DECLARE @newDate DATE;
    SET @newDate = GETDATE();  -- DATE WHICH YOU WANT TO CHEK
    SELECT @EffectiveFrom = EffectiveFrom FROM INSERTED;
    SELECT @EffectiveTo = EffectiveTo FROM INSERTED;

    IF (@newDate > @EffectiveFrom AND @newDate < @EffectiveTo)
        BEGIN
        INSERT INTO [{yourDB}].[dbo].[{tblName}] 
        SELECT * FROM INSERTED;
        PRINT 'DATA SUCCESSFULLY ADDED.'
        END
    ELSE PRINT 'ERROR : DATE IS NOT IN BETWEEN EffectiveFrom and EffectiveTo DATE'
END


INSERT INTO [{yourDB}].[dbo].[{tblName}] VALUES(CAST('24-NOV-2012' AS DATE),CAST('30-NOV-2012' AS DATE))

消息 --result 错误：日期不在 EffectiveFrom 和 EffectiveTo DATE 之间

INSERT INTO [{yourDB}].[dbo].[{tblName}] VALUES(CAST('24-NOV-2012' AS DATE),CAST('02-DEC-2012' AS DATE))

消息——结果（1 行受影响）数据已成功添加。