Question

可能重复：
WHERE Something IN (CASE WHEN statement) ??!!

我希望ro写一个“选择地点”的cluase与cinditonal条件我在“where ID IN”子句中使用了“case-when”但是我有以下错误：

Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

这是我的简化代码：

SELECT 
    UnitsAllocation.UnitID,
    OrganizationUnits.Title AS UnitTitle,
    'Title' AS ExpenseTitle1,
    SUM(UnitsAllocationDetails1.ExpenseAmount1) AS ExpenseAmount1
FROM
    [bdg_UnitsAllocation] UnitsAllocation LEFT OUTER JOIN 
(SELECT
            UnitsAllocationDetails.UnitsAllocationID, 
            SUM(UnitsAllocationDetails.Amount) / 1 AS ExpenseAmount1 
     FROM [bdg_UnitsAllocationDetails] UnitsAllocationDetails 
     WHERE UnitsAllocationDetails.ExpenseID IN (CASE 1 
                                                    WHEN 1 THEN (SELECT Id FROM bdg_Expenses WHERE ParentId = 1)
                                                    ELSE (SELECT Id FROM bdg_Expenses WHERE Id = 1) 
                                                END)

     GROUP BY UnitsAllocationDetails.UnitsAllocationID) UnitsAllocationDetails1 ON UnitsAllocationDetails1.UnitsAllocationID = UnitsAllocation.ID LEFT OUTER JOIN
    [bdg_OrganizationUnits] OrganizationUnits ON UnitsAllocation.UnitID = OrganizationUnits.ID
GROUP BY UnitsAllocation.UnitID, OrganizationUnits.Title

请看“WHERE UnitsAllocationDetails.ExpenseID IN ...”
我该如何解决这个问题？

Answer 1

而不是

WHERE UnitsAllocationDetails.ExpenseID IN（CASE 1 WHEN 1 THEN（SELECT Id from bdg_Expenses WHERE ParentId = 1） ELSE（SELECT Id FROM bdg_Expenses WHERE Id = 1）结束）使用以下

WHERE UnitsAllocationDetails.ExpenseID IN（SELECT Id FROM bdg_Expenses WHERE ParentId = 1 and 1 = 1 UNION ALL SELECT Id from bdg_Expenses WHERE Id = 1和1＆lt;＆gt; 1 ）

什么东西（情况何时声明）？

1 个答案: