UPDATE SKU AS S
SET
    STD_COST_PRICE = G.STD_COST_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 STD_COST_PRICE
        FROM
            SKU
        GROUP BY
            GOODS_CODE
    ) AS AVE
    INNER JOIN GOODS AS G ON AVE.GOODS_CODE = G.GOODS_CODE
WHERE
    S.STD_COST_PRICE < AVE.STD_COST_PRICE;