CREATE TABLE Movie (mID NUMBER, title CLOB, year NUMBER, director CLOB)
CREATE TABLE Reviewer (rID NUMBER, name CLOB)
CREATE TABLE Rating (rID NUMBER, mID NUMBER, stars NUMBER, 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, and show stars in descending 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 MAX(T1.stars) DESC
SELECT "title", MAX("T1"."stars") FROM "Rating" "T1" JOIN "Movie" "T2" ON "T1"."mID" = "T2"."mID" WHERE "director" <> "null" GROUP BY "title" ORDER BY MAX("T1"."stars") DESC