我如何将这个子查询作为连接？

Question

select m.m_name, p.place_town
from musician m
inner join place p
    on m.born_in = p.place_no
where m.born_in = (select m.born_in from musician m where m.m_name = 'James First') and
    m.m_name != 'James First'

Answer 1

您可以用自连接替换子查询：

select m.m_name, p.place_town
from musician m
inner join place p
    on m.born_in = p.place_no
inner join
(
    select m.born_in
    from musician m
    where m.m_name = 'James First'
) t 
    on m.born_in = t.place_no
where m.m_name != 'James First'

Answer 2

select m.m_name, p.place_town

来自音乐家 m 内部连接位置 p 在 m.born_in = p.place_no 内部联接 ( select m.born_in 来自音乐家 m 其中 m.m_name = 'James First' ) 作为吨在 t.born_in = p.place_no 其中 m.m_name != 'James First'

我如何将这个子查询作为连接？

How do I put this sub query just as join?

join

subquery