WITH temp AS (select  g_code,avg_cost,g.STD_COST_PRICE
  from  (select  GOODS_CODE g_code
        ,round(avg(STD_COST_PRICE),1) avg_cost
          from  SKU s
           group by GOODS_CODE)s
           ,GOODS g
 where  s.g_code = g.GOODS_CODE
   and  s.avg_cost > g.STD_COST_PRICE
)
update  SKU
   set  STD_COST_PRICE = (
    select t.STD_COST_PRICE from temp t
    where GOODS_CODE = t.g_code)
        ,UPDATE_USER_NAME = 'MODIFY'
   ,USER_UPDATE_DATETIME = '2024-08-31 00:00:00'
  where	exists (
  select t.STD_COST_PRICE from temp t
    where GOODS_CODE = t.g_code)