WITH MRR_ALT as (
    SELECT
        (SELECT MIN(MONTHLY) FROM MRR_DATA) AS YM,
        0 AS MRR
    UNION ALL
    SELECT
        DATE(YM, "+1 month"),
        MRR + (
            SELECT
                NEW_MRR + EXPANSION_MRR - DOWNGRADE_MRR - CHURN_MRR 
            FROM
                MRR_DATA
            WHERE
                MONTHLY = YM
        )
    FROM
        MRR_ALT
    WHERE
        YM < DATE((SELECT MAX(MONTHLY) FROM MRR_DATA), "+1 month")
)

SELECT
    *
FROM
    MRR_ALT
ORDER BY
    YM ASC