update SKU set 
    STD_COST_PRICE = (select GOODS.STD_COST_PRICE from GOODS where SKU.GOODS_CODE = GOODS.GOODS_CODE),
    UPDATE_USER_NAME = 'MODIFY',
    USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
where
    STD_COST_PRICE < (select round(cast(avg(STD_COST_PRICE) as real),0) from SKU);