CREATE TABLE "round_15" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: Who was the home team when VFL played at Windy Hill?
SQL: SELECT "home_team" FROM "round_15" WHERE "venue"='windy hill';

Question: What was the attendance when the VFL played Glenferrie Oval?
SQL: SELECT SUM("crowd") FROM "round_15" WHERE "venue"='glenferrie oval';

Question: What was the attendance when North Melbourne was the away team?
SQL: SELECT AVG("crowd") FROM "round_15" WHERE "away_team"='north melbourne';

Question: When did Essendon play as the home team?
SQL: SELECT "date" FROM "round_15" WHERE "home_team"='essendon';