-- Database schema
| Movie : mID [ INT ] primary_key , title [ TEXT ] , year [ INT ] , director [ TEXT ] | Reviewer : rID [ INT ] primary_key , name [ TEXT ] | Rating : rID [ INT ] Rating.rID = Reviewer.rID , mID [ INT ] Rating.mID = Movie.mID , stars [ INT ] , ratingDate [ TEXT ] |
-- -- Find the names of all reviewers who have ratings with a NULL value for the date.

SELECT DISTINCT name FROM Reviewer AS T1 JOIN Rating AS T2 ON T1.rID  =  T2.rID WHERE ratingDate  =  "null";