Which Set 2 has a Set 1 of 25–15, and a Score of 3–0?
CREATE TABLE "pool_a" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "total" text
);
SELECT "set_2" FROM "pool_a" WHERE "set_1"='25–15' AND "score"='3–0';