query: SELECT preferred_foot ,  avg(overall_rating) FROM Player_Attributes GROUP BY preferred_foot
question: What-all that average rating for straight-foot players and left-foot players?
query_toks: SELECT preferred_foot , avg ( overall_rating ) FROM Player_Attributes GROUP BY preferred_foot
query_toks_no_value: select preferred_foot , avg ( overall_rating ) from player_attributes group by preferred_foot
question_toks: What-all that average rating for straight-foot players and left-foot players?