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: What is the total of NA for set 4, a score of 3-0 and a 26-24 for set 2?
SQL: SELECT "total" FROM "results_pool_c" WHERE "set_4"='na' AND "score"='3-0' AND "set_2"='26-24';

Question: What is the total of the 3-0 score with a set 2 of 25-12 and a set 3 of 25-18?
SQL: SELECT "total" FROM "results_pool_c" WHERE "score"='3-0' AND "set_3"='25-18' AND "set_2"='25-12';

Question: What is the set 5 of the match with a set 2 of 26-24 and a set 1 of 27-25?
SQL: SELECT "set_5" FROM "results_pool_c" WHERE "set_2"='26-24' AND "set_1"='27-25';