CREATE TABLE "pool_a" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "total" text
);

Question: What is the Date with a Set 3 with 15–6?
SQL: SELECT "date" FROM "pool_a" WHERE "set_3"='15–6';

Question: What is the Set 3 with a Score of 3–1, and has a Set 2 of 13–15?
SQL: SELECT "set_3" FROM "pool_a" WHERE "score"='3–1' AND "set_2"='13–15';

Question: What is the Set 1 with a Score of 3–0, and has a Set 3 of 15–12?
SQL: SELECT "set_1" FROM "pool_a" WHERE "score"='3–0' AND "set_3"='15–12';

Question: What is the Set 1 with a Score of 3–0, and has a Set 3 of 15–10?
SQL: SELECT "set_1" FROM "pool_a" WHERE "score"='3–0' AND "set_3"='15–10';

Question: What is the Set 2 with a Total with 45–12?
SQL: SELECT "set_2" FROM "pool_a" WHERE "total"='45–12';

Question: What is the Total with a Score of 3–0, and a Date of 14 oct, and has a Set 1 of 15–12?
SQL: SELECT "total" FROM "pool_a" WHERE "score"='3–0' AND "date"='14 oct' AND "set_1"='15–12';