CREATE TABLE "preliminary_round_ii" (
  "team_num1" text,
  "agg" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: In the round that had a 2nd leg score of 0-2, what did they score for the 1st leg?
SQL: SELECT "1st_leg" FROM "preliminary_round_ii" WHERE "2nd_leg"='0-2';

Question: When Estudiantes was team #2, what was their agg. value?
SQL: SELECT "agg" FROM "preliminary_round_ii" WHERE "team_num2"='estudiantes';

Question: Who played against TSV bayer 04 leverkusen when they were team #1?
SQL: SELECT "2nd_leg" FROM "preliminary_round_ii" WHERE "team_num1"='tsv bayer 04 leverkusen';

Question: Who played against Hapoel tel aviv when they were team #1?
SQL: SELECT "team_num2" FROM "preliminary_round_ii" WHERE "team_num1"='hapoel tel aviv';