sql exists (函数)是否存在select *from A a where exists (select 1from B bwhere b.id a.idand b.name
sql exists (函数) 是否存在
select * from A a where exists (select 1 from B b where b.id = a.id and b.name = 'dennybruce');
?
sql exists (函数) 是否存在
select * from A a where exists (select 1 from B b where b.id = a.id and b.name = 'dennybruce');
?