CREATE TABLE "2007_rugby_world_cup_squads" (
  "player" text,
  "position" text,
  "date_of_birth_age" text,
  "caps" real,
  "club_province" text
);

Question: Which club has 1 cap?
SQL: SELECT "club_province" FROM "2007_rugby_world_cup_squads" WHERE "caps"=1;

Question: Which position has a club of Meralomas and a player named David Biddle?
SQL: SELECT "position" FROM "2007_rugby_world_cup_squads" 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 "2007_rugby_world_cup_squads" WHERE "club_province"='meralomas' AND "position"='centre';