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

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"