CREATE TABLE "table" (
  "date" real,
  "ships_sunk_pola" text,
  "tonnage" text,
  "u_boats_destroyed_ku_k" text,
  "u_boats_destroyed_pola" text
);

Question: What's the highest Date listed that has U-boats destroyed (Pola) of 1?
SQL: SELECT MAX("date") FROM "table" WHERE "u_boats_destroyed_pola"='1';

Question: What is the listed Tonnage that has U-boats destroyed (KuK) of 2 and Ships sunk (Pola) of (not recorded)?
SQL: SELECT "tonnage" FROM "table" WHERE "u_boats_destroyed_ku_k"='2' AND "ships_sunk_pola"='(not recorded)';

Question: What is the listed Tonnage for the Date of 1914?
SQL: SELECT "tonnage" FROM "table" WHERE "date"=1914;

Question: What is listed as the average Date that has U-boats destroyed (KuK) of 2 with Tonnage of 1,514,050?
SQL: SELECT AVG("date") FROM "table" WHERE "u_boats_destroyed_ku_k"='2' AND "tonnage"='1,514,050';