SELECT DISTINCT name FROM Reviewer AS T1 JOIN Rating AS T2 ON T1.rID  =  T2.rID WHERE ratingDate  =  "null"
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 ''
select distinct name from reviewer as t1 join rating as t2 on t1 . rid = t2 . rid where ratingdate = value
Find the names of all reviewers who have ratings with a NULL value for the date .