1
我想根據條件條件寫一個「select子句」! BU我有錯誤:
WHERE有什麼東西(CASE WHEN語句)?
Msg 512, Level 16, State 1, Line 2
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
我該如何解決?
這裏是我的簡化代碼:
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
請看 「CASE」 和 「IN」 的語句。
'1 = 1'情況將始終成立。你爲什麼在那裏使用'CASE'?爲什麼不簡單地擺脫它,所以'SELECT ID FROM bdg_Expenses WHERE ParentId = 1'不會是一個表達式? – outis 2010-12-11 08:28:39
我簡化了它。 when聲明最初是「WHEN @Level = 1 THEN ...」 – mahdiahmadirad 2010-12-11 09:25:07