是否可以在WHERE（MYSQL）中合并相同的选择查询

Question

我的情况：表AAAA：其他表; （包括column1：user1_seq，column2：user2_seq，...）表BBBB：用户表;

1. 我在POST BODY DATA中只收到了email_info
2. 我想选择所有数据

   (user1_seq == email_info || user2_seq == 
   email_info)

当前我的查询：

SELECT * FROM AAAA
    WHERE
        user1_seq = (SELECT seq FROM BBBB WHERE user_email = '[email protected]')
    OR
        user2_seq = (SELECT seq FROM BBBB WHERE user_email = '[email protected]')`

但选择查询重复!! ..怎么解决呢???

Answer 1

试试这个（Inner Join） -

select AAAA.*
from AAAA
inner join BBBB on (AAAA.user1_seq = BBBB.seq OR AAAA.user2_seq = BBBB.seq)
where BBBB.user_email = '[email protected]'

以上语法适用于MS SQL SERVER。检查您是否需要Inner或left join。