Find the total number of students living in the male dorm (with gender M).
create table dorm (dormid varchar, gender varchar, PRIMARY KEY (dormid)); create table lives_in (stuid varchar, dormid varchar, PRIMARY KEY (stuid)); create table student (stuid varchar, PRIMARY KEY (stuid))
select count(*) from student as t1 join lives_in as t2 on t1.stuid = t2.stuid join dorm as t3 on t3.dormid = t2.dormid where t3.gender = 'm'