What's the average Top-25, that has an Events that's smaller than 12, and has a Top-5 that is larger than 0?
CREATE TABLE "summary" (
  "tournament" text,
  "wins" real,
  "top_5" real,
  "top_10" real,
  "top_25" real,
  "events" real,
  "cuts_made" real
);
SELECT AVG("top_25") FROM "summary" WHERE "events"<12 AND "top_5">0;