UPDATE SKU
SET 
    STD_COST_PRICE = (
        SELECT ROUND(g.STD_COST_PRICE, 1)
        FROM GOODS g
        WHERE SKU.GOODS_CODE = g.GOODS_CODE
    ),
    UPDATE_USER_NAME = 'MODIFY',
    USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
WHERE STD_COST_PRICE < (
    SELECT ROUND(AVG(sku.STD_COST_PRICE), 1)
    FROM SKU sku
    WHERE sku.GOODS_CODE = SKU.GOODS_CODE
    GROUP BY sku.GOODS_CODE
);

SELECT STD_COST_PRICE FROM SKU;