If the points won were 90 and the points defending were 45, what are the new points?
CREATE TABLE "men_s_singles" (
  "sd" real,
  "rk" real,
  "player" text,
  "points" real,
  "points_defending" real,
  "points_won" real,
  "new_points" real,
  "status" text
);
SELECT "new_points" FROM "men_s_singles" WHERE "points_defending"=45 AND "points_won"=90;