CREATE TABLE Movie (mID INT, title TEXT, year INT, director TEXT)
CREATE TABLE Reviewer (rID INT, name TEXT)
CREATE TABLE Rating (rID INT, mID INT, stars INT, ratingDate DATE)

What is the average rating star for each reviewer, and order Y-axis from low to high order please.
SELECT name, AVG(T1.stars) FROM Rating AS T1 JOIN Reviewer AS T2 ON T1.rID = T2.rID GROUP BY T2.name ORDER BY AVG(T1.stars)
SELECT "name", AVG("T1"."stars") FROM "Rating" AS "T1" JOIN "Reviewer" AS "T2" ON "T1"."rID" = "T2"."rID" GROUP BY "T2"."name" ORDER BY AVG("T1"."stars") NULLS FIRST