Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_204_489 ( id number, "rank" number, "name" text, "height" text, "floors" number, "year" number, "notes" text )

### Question ###
how many floors does the tallest building have ?

### Accurate SQL ###

SELECT "floors" FROM table_204_489 ORDER BY "floors" DESC LIMIT 1