Question: Find the male friend of Alice whose job is a doctor?
Schema: create table personfriend (friend varchar, name varchar, PRIMARY KEY (friend)); create table person (name varchar, job varchar, gender varchar, PRIMARY KEY (name))
SQL: select t2.friend from person as t1 join personfriend as t2 on t1.name = t2.friend where t2.name = 'alice' and t1.gender = 'male' and t1.job = 'doctor'