create table enrolled (studentId int, courseNumber int);
insert into enrolled values (411, 201);
insert into enrolled values (411, 150);
insert into enrolled values (411, 314);
insert into enrolled values (412, 101);
insert into enrolled values (412, 301);
insert into enrolled values (412, 314);
insert into enrolled values (413, 204);
insert into enrolled values (413, 314);
insert into enrolled values (414, 204);
insert into enrolled values (414, 314);
