update SKU
set STD_COST_PRICE = (SELECT g.STD_COST_PRICE FROM GOODS g WHERE g.GOODS_CODE = SKU.GOODS_CODE),
UPDATE_USER_NAME = 'MODIFY',
USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
where STD_COST_PRICE < (
select round(avg(STD_COST_PRICE))
from SKU as s2
where s2.GOODS_CODE = SKU.GOODS_CODE
group by GOODS_CODE
)