CREATE TABLE table_9308 ("Rank" FLOAT, "Name" TEXT, "Floors*" FLOAT, "Year*  ( est. ) " TEXT, "Status" TEXT)

What is the lowest rank of the building with 12 floors?
SELECT MIN("Rank") FROM table_9308 WHERE "Floors*" = '12'
SELECT MIN("Rank") FROM "table_9308" WHERE "Floors*" = '12'