ora-00904 - ORA-00904: "S"."EMPLID": 标识符无效

Question

update dkc_hsp_pi a
set a.UaID = (select uid from 
(
select uid,
emplid,
max(EFFDT) 
from sysadm.ps_ua_eds_data
group by uid,
emplid ) s)
where s.emplid = a.emplid;

Answer 1

别名“s”在您使用它的地方无法访问：尝试将WHERE子句向上移动一个级别，如下所示：

update dkc_hsp_pi a
set a.UaID = 
(
select uid from 
  (
    select uid,
           emplid,
           max(EFFDT) 
    from sysadm.ps_ua_eds_data
    group by uid, emplid 
  ) s
  where s.emplid = a.emplid
)
;

如果您的子查询返回多个结果，则需要将第一个更改"="为 an ，或相应地调整子查询（通过在 row_number 上过滤返回单行）。"IN"