Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE Rating ( stars INTEGER, mID VARCHAR )
TABLE: CREATE TABLE Movie ( title VARCHAR, director VARCHAR, mID VARCHAR )

### Question ###
For each director, return the director's name together with the title of the movie they directed that received the highest rating among all of their movies, and the value of that rating. Ignore movies whose director is NULL.

### Accurate SQL ###

SELECT T2.title, T1.stars, T2.director, MAX(T1.stars) FROM Rating AS T1 JOIN Movie AS T2 ON T1.mID = T2.mID WHERE director <> "null" GROUP BY director