UPDATE SKU SET
 STD_COST_PRICE = G_PRICE,
 UPDATE_USER_NAME = 'MODIFY',
 USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
FROM
(
  (
 SELECT
  GOODS_CODE,
  ROUND(AVG(STD_COST_PRICE), 0) AS G_PRICE
 FROM GOODS
 GROUP BY GOODS_CODE
 ) G
INNER JOIN
 (
 SELECT
  GOODS_CODE,
  ROUND(AVG(STD_COST_PRICE), 0) AS S_PRICE
 FROM SKU 
 GROUP BY GOODS_CODE
 ) S
ON G.GOODS_CODE = S.GOODS_CODE
) G
WHERE
 SKU.GOODS_CODE = G.GOODS_CODE
AND
 G_PRICE < S_PRICE
;