CREATE TABLE Faculty_Participates_in (FacID INT, actid INT)
CREATE TABLE Faculty (FacID INT, Lname VARCHAR, Fname VARCHAR, Rank VARCHAR, Sex VARCHAR, Phone INT, Room VARCHAR, Building VARCHAR)
CREATE TABLE Student (StuID INT, LName VARCHAR, Fname VARCHAR, Age INT, Sex VARCHAR, Major INT, Advisor INT, city_code VARCHAR)
CREATE TABLE Participates_in (stuid INT, actid INT)
CREATE TABLE Activity (actid INT, activity_name VARCHAR)

What are the faculty id and the number of students each faculty has.
SELECT FacID, COUNT(*) FROM Faculty AS T1 JOIN Student AS T2 ON T1.FacID = T2.Advisor GROUP BY T1.FacID
SELECT "FacID", COUNT(*) FROM "Faculty" AS "T1" JOIN "Student" AS "T2" ON "T1"."FacID" = "T2"."Advisor" GROUP BY "T1"."FacID"