在mysql中过滤一个组

Question

我有一个表格中的样本数据

Id      Dsc
500001  INSURED
500001  THIRD PARTY
500001  THIRD PARTY
500001  THIRD PARTY
500002  INSURED
500002  THIRD PARTY
500003  INSURED
500004  BROKER
500005  CLAIMANT

我希望提取那些Dsc既不是'保险'也不是'经纪人'的ID.由于两列都有重复数据,我设计了以下查询...

Select Id from table1 where Dsc not in ('Insured', 'Broker')
Except
Select Id from table1 where Dsc in ('Insured', 'Broker')

有没有其他方法可以做到这一点？

Answer 1

SELECT id FROM table1 GROUP BY id 
HAVING SUM(CASE WHEN Dsc='Insured' THEN 1 ELSE 0 END)=0
AND SUM(CASE WHEN Dsc='Broker' THEN 1 ELSE 0 END)=0