CREATE TABLE faculty (facid NUMBER, lname CLOB, fname CLOB, rank CLOB, sex CLOB, phone NUMBER, room CLOB, building CLOB)
CREATE TABLE student (stuid NUMBER, lname CLOB, fname CLOB, age NUMBER, sex CLOB, major NUMBER, advisor NUMBER, city_code CLOB)
CREATE TABLE participates_in (stuid NUMBER, actid NUMBER)
CREATE TABLE activity (actid NUMBER, activity_name CLOB)
CREATE TABLE faculty_participates_in (facid NUMBER, actid NUMBER)

What are the ids of the faculty members who do not advise any student.
SELECT facid FROM faculty EXCEPT SELECT advisor FROM student
SELECT "facid" FROM "faculty" EXCEPT SELECT "advisor" FROM "student"