with AVG as(
    select GOODS_CODE ,round(avg(STD_COST_PRICE),0) as AVG
        from SKU
        group by GOODS_CODE
)
, S as (
  select A.goods_code, A.SKU_CODE 
        , (select STD_COST_PRICE from goods where goods.goods_code = A.goods_code ) as UPD_COST
    from sku as A inner join AVG on A.Goods_code = AVG.Goods_code
    where A.STD_COST_PRICE <  AVG.AVG
)
update SKU
    set STD_COST_PRICE = S.UPD_COST
        , UPDATE_USER_NAME = 'MODIFY' 
        , USER_UPDATE_DATETIME = '2024-08-31 00:00:00' 
    from S where SKU.goods_code = S.goods_code and  SKU.sku_code = S.sku_code