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)

Ignore movies whose director is NULL For each director, what are the titles and ratings for all the movies they reviewed? Show the result by a bar chart, order y-axis in asc order please.
SELECT title, stars FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID WHERE director <> "null" ORDER BY stars
SELECT "title", "stars" FROM "Rating" AS "T1" JOIN "Movie" AS "T2" ON "T1"."mID" = "T2"."mID" WHERE "director" <> "null" ORDER BY "stars" NULLS FIRST