CREATE TABLE Reviewer (rID INT, name TEXT)
CREATE TABLE Movie (mID INT, title TEXT, year INT, director 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 the highest rating among all of their movies they reviewed? Draw the result by a bar chart, rank x-axis in asc order.
SELECT title, MAX(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID WHERE director <> "null" GROUP BY title ORDER BY title
SELECT "title", MAX("T1"."stars") FROM "Rating" AS "T1" JOIN "Movie" AS "T2" ON "T1"."mID" = "T2"."mID" WHERE "director" <> "null" GROUP BY "title" ORDER BY "title" NULLS FIRST