What are the different names of all reviewers whose ratings do not have a date field?
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  =  "null"
[{'Nenhum': 'Nenhum resultado encontrado'}]