WITH COST AS (
    SELECT
        GOODS_CODE,
        ROUND(AVG(IFNULL(STD_COST_PRICE, 0)), 0) AS STD_COST_PRICE
    FROM
        SKU
    GROUP BY
        GOODS_CODE
)
UPDATE
    SKU
SET
    STD_COST_PRICE = GOODS.STD_COST_PRICE,
    UPDATE_USER_NAME = 'MODIFY',
    USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
FROM
    GOODS
WHERE
    SKU.GOODS_CODE = GOODS.GOODS_CODE AND
    SKU.STD_COST_PRICE < (
        SELECT
            ROUND(AVG(IFNULL(STD_COST_PRICE, 0)), 0) AS STD_COST_PRICE
        FROM
            COST
        WHERE
            GOODS_CODE = GOODS.GOODS_CODE
    )