Table: rugby_squads_2007_15
Columns: player
position
date_of_birth_age
caps
club_province

Question: Which club has 1 cap?
SQL: SELECT "club_province" FROM rugby_squads_2007_15 WHERE "caps" = 1

Question: Which position has a club of Meralomas and a player named David Biddle?
SQL: SELECT "position" FROM rugby_squads_2007_15 WHERE "club_province" = 'meralomas' AND "player" = 'david biddle'

Question: What is the average number of caps for Meralomas with positions of centre?
SQL: SELECT AVG("caps") FROM rugby_squads_2007_15 WHERE "club_province" = 'meralomas' AND "position" = 'centre'