Question

Msg 512，Level 16，State 1，Line 2子查询返回的值超过1。这是不允许的当子查询跟随=，！=，＆lt;，＆lt; =，＆gt;，＆gt; =或子查询用作表达式时。

（从Ware.dbo.Dimf中选择LocationId，其中t.OriginalLocationId = l.LocationId和t.CompanyId = l.CompanyId）作为LocationId ，CASE WHEN（从Ware.dbo.DimU ut中选择UnitTypeId，其中t.unit_type = ut.UnitType）IS NULL那么9999 ELSE （从Ware.dbo.DimU ut中选择UnitTypeId，其中t.unit_type = ut.UnitType）END作为UnitTypeId ，CASE WHEN（从Ware.dbo.Dimc f中选择FirmwareId，其中t.FirmwareVersion = f.Firmware和t.CompanyId = f.CompanyId）IS NULL那么9999 其他（从Ware.dbo.Dimc f中选择FirmwareId，其中t.FirmwareVersion = f.Firmware和t.CompanyId = f.CompanyId）结束作为FirmwareId ，ISNULL（t.Installs，0）as Installs

，AddDate = GETDATE（）来自＃Temp2 t where（从Ware.dbo.Dimf中选择LocationId，其中t.OriginalLocationId = l.LocationId和t.CompanyId = l.CompanyId）不为null 按LocationId排序

Answer 1

曾经听说过Joins .......也许会尝试像......

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

消息512，级别16，状态1，行2子查询返回的值超过1。这是不允许的

1 个答案: