CREATE TABLE table_7881 ("Name" CLOB, "Location" CLOB, "Years as tallest" CLOB, "Height metres / ft" CLOB, "Floors" CLOB)

How many floors did the tallest building in Aston have?
SELECT "Floors" FROM table_7881 WHERE "Location" = 'aston'
SELECT "Floors" FROM "table_7881" WHERE "Location" = 'aston'