CREATE TABLE table_name_31 (points_for VARCHAR2, played VARCHAR2, club VARCHAR2)

What points has 18 for the played and bala rfc as the club?
SELECT points_for FROM table_name_31 WHERE played = "18" AND club = "bala rfc"
SELECT "points_for" FROM "table_name_31" WHERE "18" = "played" AND "bala rfc" = "club"