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

how many students are advised by each rank of faculty? List the rank and the number of students, order by the the total number from high to low.
SELECT Rank, COUNT(*) FROM Faculty AS T1 JOIN Student AS T2 ON T1.FacID = T2.Advisor GROUP BY T1.Rank ORDER BY COUNT(*) DESC
SELECT "Rank", COUNT(*) FROM "Faculty" AS "T1" JOIN "Student" AS "T2" ON "T1"."FacID" = "T2"."Advisor" GROUP BY "T1"."Rank" ORDER BY COUNT(*) DESC NULLS LAST