Question

所以我被困在这个我的声明中。每个单独的情况在where子句中运行良好，但是当我尝试将其包装在一个case语句时它会破坏我。在语句的情况下使用between语句是否存在问题？下面是代码。如果有任何想法请分享！

英语中的逻辑是ssrs表单上有一个复选框。所以box可以是1或0，根据值，我将执行where语句。

WHERE (CASE @box
WHEN 1 THEN (CheckReg.CheckDate BETWEEN @ChkStartDate and @ChkEndDate OR CheckReg.CheckDate IS NULL) 
ELSE 0 THEN (CheckReg.CheckDate BETWEEN @ChkStartDate and @ChkEndDate OR CheckReg.CheckDate IS NULL 
AND NOT  CheckReg.CheckDate IS NULL AND CheckReg.CheckDate IS NOT NULL)
END)

如果有人知道更好的解决方案，那么上面的逻辑请告诉我。我正在使用Microsoft sql sever

Answer 1

您需要使用(monthIndex = 1 and: [day = 1]) ifTrue: [ <etc> ]

OR

或者您可以合并WHERE (@box = 1 AND (CheckReg.CheckDate BETWEEN @ChkStartDate and @ChkEndDate OR CheckReg.CheckDate IS NULL)) OR (@box = 0 AND (CheckReg.CheckDate BETWEEN @ChkStartDate and @ChkEndDate OR CheckReg.CheckDate IS NULL AND NOT CheckReg.CheckDate IS NULL AND CheckReg.CheckDate IS NOT NULL))部分中的条件并与WHEN进行比较：

THEN

Answer 2

您无法使用CASE - CASE用于条件分配，而不是用于条件逻辑。您需要将每个逻辑流分开：

WHERE 
(
    @box = 1 
    AND (CheckReg.CheckDate BETWEEN @ChkStartDate and @ChkEndDate OR CheckReg.CheckDate IS NULL) 
)
OR
(
    @box = 0
    AND (CheckReg.CheckDate BETWEEN @ChkStartDate and @ChkEndDate OR CheckReg.CheckDate IS NULL )
    AND NOT (CheckReg.CheckDate IS NULL AND CheckReg.CheckDate IS NOT NULL)
)

T-SQL CASE WHEN语句不兼容

2 个答案: