CREATE TABLE table_204_489 (id DECIMAL, "rank" DECIMAL, "name" TEXT, "height" TEXT, "floors" DECIMAL, "year" DECIMAL, "notes" TEXT)

which building has the most floors according to this chart ?
SELECT "name" FROM table_204_489 ORDER BY "floors" DESC LIMIT 1
SELECT "name" FROM "table_204_489" ORDER BY "floors" DESC NULLS LAST LIMIT 1