CREATE TABLE player (player_id NUMBER, player CLOB, years_played CLOB, total_wl CLOB, singles_wl CLOB, doubles_wl CLOB, team NUMBER)
CREATE TABLE match_season (season NUMBER, player CLOB, position CLOB, country NUMBER, team NUMBER, draft_pick_number NUMBER, draft_class CLOB, college CLOB)
CREATE TABLE team (team_id NUMBER, name CLOB)
CREATE TABLE country (country_id NUMBER, country_name CLOB, capital CLOB, official_native_language CLOB)

Show the position of players and the corresponding number of players.
SELECT position, COUNT(*) FROM match_season GROUP BY position
SELECT "position", COUNT(*) FROM "match_season" GROUP BY "position"