select sum(grade) sum_grade from stu s
where s.id in(
select t1.id from stu t1
inner join stu t2
on t1.id=t2.c_id
);
select * from stu;
SQL语句in求和
猜你喜欢
转载自weiyongjie.iteye.com/blog/2233452
今日推荐
周排行