消息512，級別16，狀態1，行2子查詢返回了多個值。這是不允許的

Question

消息512，級別16，狀態1，行2子查詢返回多個值。當子查詢遵循=，！=，<，< =，>，> =或當子查詢用作表達式時，不允許使用 。

如LocationId ，CASE WHEN（從Ware.dbo.Dimf升其中t.OriginalLocationId = l.LocationId和t.CompanyId = l.CompanyId選擇LocationId）（從Ware.dbo.DimU UT其中t選擇UnitTypeId。 unit_type = ut.UnitType）IS NULL THEN 9999 ELSE （從Ware.dbo.DimU中選擇UnitTypeId，其中t.unit_type = ut.UnitType）END作爲UnitTypeId ，CASE WHEN（從Ware.dbo.Dimc中選擇FirmwareId其中t .FirmwareVersion = f.Firmware和t.CompanyId = f.CompanyId）IS NULL THEN 9999 ELSE （從Ware.dbo.Dimc中選擇FirmwareId，其中t.FirmwareVersion = f.Firmware和t.CompanyId = f.CompanyId） END as FirmwareId ，ISNULL（t.Installs，0）as安裝

，ADDDATE = GETDATE（） 從＃TEMP2噸 其中（選擇LocationId從Ware.dbo.Dimf升其中t.OriginalLocationId = l.LocationId和t.CompanyId = l.CompanyId）不爲空 訂單通過LocationId

Answer 1

聽過加入.......也許你可以試試.....

Select l.LocationId    as LocationId 
    , ISNULL(ut.UnitTypeId, 9999) as UnitTypeId 
    , ISNULL(f.FirmwareId , 9999) as FirmwareId 
    , ISNULL(t.Installs,0)  as Installs 
    , GETDATE()     as AddDate 
from #Temp2 t 
LEFT JOIN Ware.dbo.Dimf l ON t.OriginalLocationId = l.LocationId 
          and t.CompanyId = l.CompanyId 
LEFT JOIN Ware.dbo.DimU ut ON t.unit_type = ut.UnitType 
LEFT JOIN Ware.dbo.Dimc f ON t.FirmwareVersion = f.Firmware 
          and t.CompanyId = f.CompanyId 
where l.LocationId is not null 
Order by l.LocationId