CREATE TABLE table_2942 ("Rank" FLOAT, "Building [A ]" TEXT, "City" TEXT, "Country" TEXT, "Height  ( m ) " TEXT, "Height  ( ft ) " TEXT, "Floors" FLOAT, "Built" TEXT)

How many different numbers of floors are there for the Chongqing Poly Tower?
SELECT COUNT("Floors") FROM table_2942 WHERE "Building [A ]" = 'Chongqing Poly Tower'
SELECT COUNT("Floors") FROM "table_2942" WHERE "Building [A ]" = 'Chongqing Poly Tower'