What date is for Venue of jjb stadium, and a Result of w?
CREATE TABLE "2003_fixtures_and_results" (
  "date" text,
  "competition" text,
  "venue" text,
  "result" text,
  "score" text
);
SELECT "date" FROM "2003_fixtures_and_results" WHERE "venue"='jjb stadium' AND "result"='w';