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 GOODS.GOODS_CODE = SKU.GOODS_CODE AND SKU.STD_COST_PRICE < (SELECT ROUND(AVG(STD_COST_PRICE)) FROM SKU WHERE GOODS.GOODS_CODE = SKU.GOODS_CODE);