WITH T1 AS (
    SELECT
        GOODS_CODE,
        ROUND(AVG(STD_COST_PRICE), 0) AS cost
    FROM
        SKU
    GROUP BY
        GOODS_CODE
),
T2 AS (
    SELECT
        T1.GOODS_CODE,
        GOODS.STD_COST_PRICE
    FROM
        SKU
        INNER JOIN T1 ON SKU.GOODS_CODE = T1.GOODS_CODE
        INNER JOIN GOODS ON SKU.GOODS_CODE = GOODS.GOODS_CODE
    WHERE
        SKU.STD_COST_PRICE < T1.cost
)
UPDATE
    SKU
SET
    UPDATE_USER_NAME = 'MODIFY',
    USER_UPDATE_DATETIME = '2024-08-31 00:00:00',
    STD_COST_PRICE = (
        SELECT
            STD_COST_PRICE
        FROM
            T2
        WHERE
            T2.GOODS_CODE = SKU.GOODS_CODE
    )
WHERE
    GOODS_CODE IN (
        SELECT
            GOODS_CODE
        FROM
            T2
    );