我有下表

Question

我有一张表格如下

Parent ID   child   child status        
1   abc active
1   adf deleted
1   afc deleted

2   tyt deleted
2   rtf deleted

3   xyz deleted
3   dfr deleted
3   rty deleted
3   tyu deleted

4   poi active
4   plm deleted
4   piu deleted
4   pkg deleted

我需要返回所有子列都处于已删除状态的父级。

例如，在上表中我需要父2,3作为结果。

Answer 1

您可以使用聚合和having子句来执行此操作：

select parentid
from t
group by parentid
having min(childstatus) = max(childstatus) and
       min(childstatus) = 'deleted';