SELECT MONTH.YEAR_MONTH,
       MONTH.MONTH_AMT,
       MONTH.CUML_AMT,
       BEFORE.SALES_AMT + MONTH.MONTH_AMT AS YEAR_MOVE_AMT
  FROM (SELECT BASE.MONTH AS YEAR_MONTH,
               BASE.TOTAL_SALES AS MONTH_AMT,
               SUM(CUML.TOTAL_SALES) AS CUML_AMT
          FROM (SELECT SUBSTR(SALES_DATE,1,7) AS MONTH,
                       SUM(SALES_AMT) AS TOTAL_SALES
                  FROM SALES
                 WHERE UPDATED_NO IS NULL
                   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2023-01' AND '2023-12'
                 GROUP BY SUBSTR(SALES_DATE,1,7)
                )  BASE INNER JOIN (SELECT SUBSTR(SALES_DATE,1,7) AS MONTH,
                                           SUM(SALES_AMT) AS TOTAL_SALES
                                      FROM SALES
                                     WHERE UPDATED_NO IS NULL
                                       AND SUBSTR(SALES_DATE,1,7) BETWEEN '2023-01' AND '2023-12'
                                     GROUP BY SUBSTR(SALES_DATE,1,7)
                                   ) CUML
                            ON BASE.MONTH >= CUML.MONTH
          GROUP BY  BASE.MONTH,BASE.TOTAL_SALES
        ) MONTH INNER JOIN (SELECT '2023-01' AS YEAR_MONTH,
       SUM(SALES_AMT) AS SALES_AMT
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-02' AND '2022-12'
UNION
SELECT '2023-02' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-03' AND '2023-01'
UNION
SELECT '2023-03' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-04' AND '2023-02'

UNION
SELECT '2023-04' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-05' AND '2023-03'
UNION
SELECT '2023-05' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-06' AND '2023-04'
UNION
SELECT '2023-06' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-07' AND '2023-05'
UNION
SELECT '2023-07' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-08' AND '2023-06'
UNION
SELECT '2023-08' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-09' AND '2023-07'
UNION
SELECT '2023-09' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-10' AND '2023-08'

UNION
SELECT '2023-10' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-11' AND '2023-09'

UNION
SELECT '2023-11' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2022-12' AND '2023-10'

UNION
SELECT '2023-12' AS YEAR_MONTH,
       SUM(SALES_AMT)
  FROM SALES
 WHERE UPDATED_NO IS NULL
   AND SUBSTR(SALES_DATE,1,7) BETWEEN '2023-01' AND '2023-11'
) BEFORE
ON MONTH.YEAR_MONTH = BEFORE.YEAR_MONTH
ORDER BY MONTH.YEAR_MONTH