WITH MRR1 AS (
	SELECT
		 date(MONTHLY, 'localtime', '+2 months') MONTH1
		,NEW_MRR + EXPANSION_MRR + DOWNGRADE_MRR + CHURN_MRR MRRM1
	FROM MRR_DATA
),
 MRR2 AS (
	SELECT
		 date(MONTHLY, 'localtime', '+1 months') MONTH2
		,NEW_MRR + EXPANSION_MRR + DOWNGRADE_MRR + CHURN_MRR MRRM2
	FROM MRR_DATA
)
SELECT
	MONTHLY YM,MRRM1+MRRM2 MRR
FROM MRR_DATA,MRR1,MRR2
WHERE MONTHLY = MONTH1
AND MONTHLY = MONTH2