标签:user mysq max ssid mysql name select 子查询 ssi
1.标量子查询
select *from myuser where classid=
(
select classid from myclass
where classname=‘2班‘
)
2.列子查询
select *from myuser where classid in
(
select classid from myclass
)
3.行子查询
SELECT * from myuser
where (classid,age)=
(
select max(classid),min(age)
from myuser
)
标签:user mysq max ssid mysql name select 子查询 ssi
原文地址:http://www.cnblogs.com/caohuimingfa/p/6853444.html