query: SELECT gameid ,  sum(hours_played) FROM Plays_games GROUP BY gameid
question: What are ids and total number of hours played for each game?
query_toks: SELECT gameid , sum ( hours_played ) FROM Plays_games GROUP BY gameid
query_toks_no_value: select gameid , sum ( hours_played ) from plays_games group by gameid
question_toks: What are ids and total number of hours played for each game?