Who was the team 1 in the match that had a 1st leg score of 3-0 and a 2nd leg of 1-2?
CREATE TABLE "second_round" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "team_1" FROM "second_round" WHERE "2nd_leg"='1-2' AND "1st_leg"='3-0';