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

Question: What is the set 2 with a 25-23 set 1 and a 17-19 set 5?
SQL: SELECT "set_2" FROM "results_pool_b" WHERE "set_1"='25-23' AND "set_5"='17-19';

Question: What is the set 5 with a 25-23 set 3?
SQL: SELECT "set_5" FROM "results_pool_b" WHERE "set_3"='25-23';