Question

我想选择所有列但是如果fuel = 1则开始日期＆gt; '1 oct 2013'否则，如果燃料= 0，则开始日期＆gt; '九月一日'。

使用SQL Server 2005。

我试过了..

SELECT * FROM   EntitlementEpisode
WHERE
    IF EnFuel = 1
        THEN
            IF
                BEGIN
                    [EnEpisodeStart] > 
                    (SELECT TOP 1 [BeYearStart] 
                    FROM [BenefitYear] ORDER BY [BeId] desc)
                END
            ELSE IF EnFuel = 0
       THEN
            IF
                 BEGIN
                      [EnEpisodeStart] > 
                      CONVERT(VARCHAR(30), '1 OCT' + YEAR(GETDATE()))
            END

这是正确的解决方法吗？

Answer 1

使用二元运算符的强度......！

SELECT * 
FROM   EntitlementEpisode
WHERE
   (EnFuel=1 AND EnEpisodeStart] > 
                (SELECT TOP 1 [BeYearStart] 
                FROM [BenefitYear] ORDER BY [BeId] desc))

   OR

   (EnFuel=0 AND [EnEpisodeStart] > 
                  CONVERT(VARCHAR(30), '1 OCT' + YEAR(GETDATE())))

Answer 2

像

这样的东西

SELECT  * 
FROM    EntitlementEpisode
WHERE   (EnFuel = 1 AND [EnEpisodeStart] > (SELECT TOP 1 [BeYearStart] FROM [BenefitYear] ORDER BY [BeId] desc)
OR      (EnFuel = 0 AND [EnEpisodeStart] > CONVERT(VARCHAR(30), '1 OCT' + YEAR(GETDATE())))

SQL查询：选择所有位置，如果x = 1，则为y

2 个答案: