Which club has the most members majoring in "600"?
create table student (stuid varchar, major varchar, PRIMARY KEY (stuid)); create table member_of_club (clubid varchar, stuid varchar, PRIMARY KEY (clubid)); create table club (clubname varchar, clubid varchar, PRIMARY KEY (clubname))
select t1.clubname from club as t1 join member_of_club as t2 on t1.clubid = t2.clubid join student as t3 on t2.stuid = t3.stuid where t3.major = "600" group by t1.clubname order by count(*) desc limit 1