SELECT '01' month FROM DUAL UNION ALL SELECT '02' month FROM DUAL UNION ALL SELECT '03' month FROM DUAL UNION ALL SELECT '04' month FROM DUAL UNION ALL SELECT '05' month FROM DUAL UNION ALL SELECT '06' month FROM DUAL UNION ALL SELECT '07' month FROM DUAL UNION ALL SELECT '08' month FROM DUAL UNION ALL SELECT '09' month FROM DUAL UNION ALL SELECT '10' month FROM DUAL UNION ALL SELECT '11' month FROM DUAL UNION ALL SELECT '12' month FROM DUAL