what is the total of floors when the name is kölntriangle and rank is less thank 63?
CREATE TABLE "tallest_buildings" (
  "rank" real,
  "name" text,
  "city" text,
  "height_m" real,
  "height_ft" real,
  "floors" real
);
SELECT SUM("floors") FROM "tallest_buildings" WHERE "name"='kölntriangle' AND "rank"<63;