Question

我正在尝试使用以下查询更新我的临时表的列：

Update T
Set T.ConsumedQuantity  = SUM(MA.Quantity)
from @TempTable T
Join DefaultShopView DSV on DSV.OperationId =@OpId
join MySpec MS with(nolock) on MS.WorkRequest = DSV.WorkRequest
join MyActual MA with(nolock) on MA.SpecId = MS.SpecId

但得到错误：

聚合可能不会出现在UPDATE语句的集合列表中。

如何更新值？

Answer 1

您可以使用：

Update T
Set T.ConsumedQuantity  = (select SUM(MA.Quantity) from @TempTable
            Join DefaultShopView DSV on DSV.OperationId =@OpId
            join MySpec MS with(nolock) on MS.WorkRequest = DSV.WorkRequest
            join MyActual MA with(nolock) on MA.SpecId = MS.SpecId ) 
from @TempTable T
Join DefaultShopView DSV on DSV.OperationId =@OpId
join MySpec MS with(nolock) on MS.WorkRequest = DSV.WorkRequest
join MyActual MA with(nolock) on MA.SpecId = MS.SpecId

Answer 2

最简单的使用CTE：

;WITH CTE as (
    SELECT T.IDENTIFIERS_FIELDS, SUM(MA.Quantity) as MA_Sum
    from @TempTable T
    DefaultShopView DSV on DSV.OperationId =@OpId
    join MySpec MS with(nolock) on MS.WorkRequest = DSV.WorkRequest
    join MyActual MA with(nolock) on MA.SpecId = MS.SpecId 
    GROUP BY GROUPING_FIELDS_IF_ANY
)
Update T
Set T.ConsumedQuantity  = MA_Sum
from @TempTable T
Join CTE on T.IDENTIFIERS_FIELDS = CTE.IDENTIFIERS_FIELDS

如果您需要分组，阅读问题不明确。将此选择作为模板来自定义最终查询。

错误：聚合可能不会出现UPDATE语句

2 个答案: