WITH AvgCost AS (
    SELECT 
        GOODS_CODE,
        ROUND(AVG(STD_COST_PRICE), 1) AS AVG_STD_COST_PRICE
    FROM SKU
    GROUP BY GOODS_CODE
)

-- Step 2: Update SKU standard cost price if it is less than the average standard cost price
UPDATE SKU
SET 
    STD_COST_PRICE = (SELECT STD_COST_PRICE FROM GOODS WHERE GOODS.GOODS_CODE = SKU.GOODS_CODE),
    UPDATE_USER_NAME = 'MODIFY',
    USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
WHERE 
    SKU.GOODS_CODE IN (SELECT GOODS_CODE FROM AvgCost)
    AND SKU.STD_COST_PRICE < (SELECT AVG_STD_COST_PRICE FROM AvgCost WHERE AvgCost.GOODS_CODE = SKU.GOODS_CODE);