What was the first leg score for the match that had a 0-2 2nd leg score?
CREATE TABLE "second_round" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "1st_leg" FROM "second_round" WHERE "2nd_leg"='0-2';