CREATE TABLE rating (rid NUMBER, mid NUMBER, stars NUMBER, ratingdate TIME)
CREATE TABLE movie (mid NUMBER, title CLOB, year NUMBER, director CLOB)
CREATE TABLE reviewer (rid NUMBER, name CLOB)

For each director, what is the title and score of their most poorly rated movie?
SELECT T2.title, T1.stars, T2.director, MIN(T1.stars) FROM rating AS T1 JOIN movie AS T2 ON T1.mid = T2.mid GROUP BY T2.director
SELECT "T2"."title", "T1"."stars", "T2"."director", MIN("T1"."stars") FROM "rating" "T1" JOIN "movie" "T2" ON "T1"."mid" = "T2"."mid" GROUP BY "T2"."director"