从CTE删除时出错

Posted 2021-04-15

with CTE AS
(
    select AGENT_USERID,
           ROW_NUMBER() OVER(PARTITION BY AGENT_USERID ORDER BY (agent_USERID)) AS RN
    FROM KYCKEN.PAP_KYCAGENTCONFIG
)
DELETE FROM CTE where RN > 1

我收到运行查询时需要语句的错误。之前没有代码。使用查询删除重复项。选择代替删除工作正常，但使用删除抛出错误。

答案

适用于Linux / Unix / Windows的Db2接受以下语法：

with cte as
  (
    select agent_userid
          ,row_number() over (partition by agent_userid order by (agent_userid)) as rn
    from kycken.pap_kycagentconfig
  )
select agent_userid as agent_userid_to_delete 
from old table
  ( delete from kycken.pap_kycagentconfig
    where agent_userid in (select agent_userid from cte where rn > 1) 
  )
;

另一答案

在DB2上，尝试这样的事情：

DELETE FROM KYCKEN.PAP_KYCAGENTCONFIG f0
where rrn(f0) in 
(
  select f2.rnwrite 
  from  (
            select f1.AGENT_USERID, rrn(f1) rnwrite, 
            ROWNUMBER() OVER(PARTITION BY f1.AGENT_USERID ORDER BY f1.agent_USERID) AS RN
            FROM KYCKEN.PAP_KYCAGENTCONFIG f1
        ) f2 
  where f2.RN>1

)