What are the average byes that are greater than 1479, wins greater than 5 and 0 draws?
CREATE TABLE "2009_ladder" (
  "tallangatta_dfl" text,
  "wins" real,
  "byes" real,
  "losses" real,
  "draws" real,
  "against" real
);
SELECT AVG("byes") FROM "2009_ladder" WHERE "against">1479 AND "wins">5 AND "draws"<0;