DouKaku?

SELECT DISTINCT t.x*v.y count_up
FROM (
SELECT 0 x FROM DUAL UNION
SELECT 1 FROM dual UNION
SELECT 2 FROM dual UNION
SELECT 3 FROM dual UNION
SELECT 4 FROM dual UNION
SELECT 5 FROM dual UNION
SELECT 6 FROM dual UNION
SELECT 7 FROM dual UNION
SELECT 8 FROM dual UNION
SELECT 9 FROM dual) t
, (SELECT 1 y FROM dual UNION
SELECT 10 FROM dual UNION
SELECT 100 FROM dual UNION
SELECT 1000 FROM dual UNION
SELECT 10000 FROM dual UNION
SELECT 100000 FROM dual UNION
SELECT 1000000 FROM dual UNION
SELECT 10000000 FROM dual UNION
SELECT 100000000 FROM dual UNION
SELECT 1000000000 FROM dual UNION
SELECT 10000000000 FROM dual UNION
SELECT 100000000000 FROM dual UNION
SELECT 1000000000000 FROM dual) v
WHERE t.x*v.y <= 300
ORDER BY t.x*v.y;