內子查詢需要在同一組，但不是在所有組

Question

Select GroupId,count(distinct GroupProgramYearParticipantID)as [ChildAddedcurrent] 
from #temp1 
Where (MonthFlag = 0) and (ParticipantTypeName = 'child') 
and (GroupProgramYearParticipantID not in 
(Select distinct GroupProgramYearParticipantID 
from #temp1 
Where (MonthFlag = 1) and (ParticipantTypeName = 'child'))) 
group by groupId 

內選擇查詢檢查，以檢查在所有GROUPID在表中，但我希望它在在外部選擇中引用的每個對應的組檢查查詢。

Answer 1

您需要在子查詢中添加一個where子句，以通過其groupId引用主查詢，以獲得您正在尋找的結果。

Select GroupId,count(distinct GroupProgramYearParticipantID)as [ChildAddedcurrent] 
from #temp1 
Where (MonthFlag = 0) and (ParticipantTypeName = 'child') 
and (GroupProgramYearParticipantID not in 
(Select distinct GroupProgramYearParticipantID 
from #temp1 t 
Where (t.MonthFlag = 1) and (t.ParticipantTypeName = 'child') and t.GroupId = GroupId)) 
group by groupId