CREATE TABLE "results_pool_c" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "set_4" text,
  "set_5" text,
  "total" text
);

Question: Which set 3 has a Set 1 of 19-25, and a Set 2 of 19-25?
SQL: SELECT "set_3" FROM "results_pool_c" WHERE "set_1"='19-25' AND "set_2"='19-25';

Question: What is the set 5 if the Date is jun 7, and a Set 4 is 21-25?
SQL: SELECT "set_5" FROM "results_pool_c" WHERE "date"='jun 7' AND "set_4"='21-25';

Question: What is the Set 5 if Set 2 is 25-20?
SQL: SELECT "set_5" FROM "results_pool_c" WHERE "set_2"='25-20';