SELECT *
FROM
 (SELECT
   (SELECT MIN(MONTHLY) FROM MRR_DATA) AS YM
   , 0 AS MMR
  UNION ALL
  SELECT
   DATE((SELECT MIN(MONTHLY) FROM MRR_DATA), '+1 MONTH')
   , (SELECT NEW_MRR + EXPANSION_MRR - DOWNGRADE_MRR - CHURN_MRR FROM MRR_DATA WHERE MONTHLY = (SELECT MIN(MONTHLY) FROM MRR_DATA))
  WHERE (SELECT MIN(MONTHLY) FROM MRR_DATA) < DATE((SELECT MAX(MONTHLY) FROM MRR_DATA), '1 MONTH')
 )