Question

我有以下查询

select a.id, a.user_id, a.approver_id, a.second_approver_id 
from tbl_approve_master a 
WHERE user_id in (select id from tbl_user where name like '%john%')
or approver_id in (select id from tbl_user where name like '%john%') 
or second_approver_id in (select id from tbl_user where name like '%john%')

我如何重用in的查询语句？我尝试了How to reuse a sub query in sql?的接受答案为

with cte as (select id from tbl_user where name like '%john%')
select a.id, a.user_id, a.approver_id, a.second_approver_id 
from tbl_approve_master a 
WHERE user_id in cte
or approver_id in cte 
or second_approver_id in cte

但这不行。我怎样才能实现它？

Answer 1

试试这个：

select a.id, a.user_id, a.approver_id, a.second_approver_id 
from tbl_approve_master a 
WHERE exists (
    select * 
    from tbl_user u
    where u.name like '%john%'
    and u.id in (a.user_id, a.approver_id, a.second_approver_id)
)

Answer 2

您可以尝试这样：

select a.id, a.user_id, a.approver_id, a.second_approver_id 
from tbl_approve_master a
where exists (select 1 from tbl_user at
              where (a.user_id  = at.id
                or a.approver_id  = at.id
                or a.second_approver_id =id)
                and (at.name like '%john%'))

Answer 3

尝试此查询。

;with cte as (select id from tbl_user where name like '%john%')
select a.id, a.user_id, a.approver_id, a.second_approver_id 
from tbl_approve_master a 
join cte 
    on user_id = cte.id or approver_id = cte.id or second_approver_id = cte.id

如何重用IN子查询的查询？

3 个答案: