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

What are the names of reviewers who had rated 3 star and 4 star?
SELECT T2.name FROM rating AS T1 JOIN reviewer AS T2 ON T1.rid = T2.rid WHERE T1.stars = 3 INTERSECT SELECT T2.name FROM rating AS T1 JOIN reviewer AS T2 ON T1.rid = T2.rid WHERE T1.stars = 4
SELECT "T2"."name" FROM "rating" "T1" JOIN "reviewer" "T2" ON "T1"."rid" = "T2"."rid" WHERE "T1"."stars" = 3 INTERSECT SELECT "T2"."name" FROM "rating" "T1" JOIN "reviewer" "T2" ON "T1"."rid" = "T2"."rid" WHERE "T1"."stars" = 4