Which date had a loser of New York Giants and a result of 23-17?
CREATE TABLE "1980s_giants_12_9" (
  "year" real,
  "date" text,
  "winner" text,
  "result" text,
  "loser" text,
  "location" text
);
SELECT "date" FROM "1980s_giants_12_9" WHERE "loser"='new york giants' AND "result"='23-17';