With SUM_MRR AS (
	SELECT
		 MIN(MONTHLY) YM
		, 0 AS MRR
	FROM MRR_DATA
	UNION
	SELECT
		 strftime('%Y-%m-%d',datetime(MONTHLY,'1 month')) YM
		,NEW_MRR + EXPANSION_MRR - DOWNGRADE_MRR - CHURN_MRR MRR
	FROM MRR_DATA MD
)
SELECT YM,MRR
FROM SUM_MRR
ORDER BY YM