CREATE TABLE table_204_489 (id NUMBER, "rank" NUMBER, "name" CLOB, "height" CLOB, "floors" NUMBER, "year" NUMBER, "notes" CLOB)

what is the number of floors of the oldest building ?
SELECT "floors" FROM table_204_489 ORDER BY "year" LIMIT 1
SELECT "floors" FROM "table_204_489" ORDER BY "year" FETCH FIRST 1 ROWS ONLY