SQL無效標識查詢

Question

select x_pick.prod_code, 
    x_order.order_state, 
    x_pick.pick_state, 
    x_pick.pick_qty, 
    x_pick.pick_location, 
    x_order.wave_id, 
    x_prod.normal_pick_area, 
    x_apr_loc.location, 
    x_order.reqd_despatch_time, 
    x_prod.bncd_awkward_item, 
    master.loc_count 
from x_pick, 
    x_order, 
    x_prod, 
    x_apr_loc, 
    -- True Qty-- 
    (
    select 
     sub1.loc_count, 
     area.normal_pick_area, 
     (case when SUM(aerosolqty) = 0 then 0 when SUM(aerosolvisit) = 0 then 0 else SUM(aerosolqty)/SUM(aerosolvisit) end) as aerosolratio, 
     (case when SUM(hazqty) = 0 then 0 when SUM(hazvisit) = 0 then 0 else SUM(hazqty)/SUM(hazvisit) end) as hazratio, 
     (case when SUM(hvqty) = 0 then 0 when SUM(hvvisit) = 0 then 0 else SUM(hvqty)/SUM(hvvisit) end) as hvratio, 
     (case when SUM(hlopqty) = 0 then 0 when SUM(hlopvisit) = 0 then 0 else SUM(hlopqty)/SUM(hlopvisit) end) as hlopratio, 
     (case when SUM(plqty) = 0 then 0 when SUM(plvisit) = 0 then 0 else SUM(plqty)/SUM(plvisit) end) as plratio, 
     (case when SUM(miniloadqty) = 0 then 0 when SUM(miniloadvisit) = 0 then 0 else SUM(miniloadqty)/SUM(miniloadvisit) end) as miniloadratio, 
     (case when SUM(aprqty) = 0 then 0 when SUM(aprvisit) = 0 then 0 else SUM(aprqty)/SUM(aprvisit) end) as aprratio, 
     (case when SUM(apr2qty) = 0 then 0 when SUM(apr2visit) = 0 then 0 else SUM(apr2qty)/SUM(apr2visit) end) as apr2ratio, 
     (case when SUM(aprawkqty) = 0 then 0 when SUM(aprawkvisit) = 0 then 0 else SUM(aprawkqty)/SUM(aprawkvisit) end) as aprawkratio, 
     (SUM(aerosolqty + hazqty + hvqty + hlopqty + plqty + miniloadqty + aprqty + apr2qty + aprawkqty)) as grandtotal, 
     (SUM(aerosolvisit + hazvisit + hvvisit + hlopvisit + plvisit + miniloadvisit + aprvisit + apr2visit + aprawkvisit)) as grandvisit 



    from 
     (select area.normal_pick_area, 
      (case when area.normal_pick_area = 'Aerosol' then trueqty else 0 end) as aerosolqty, 
      (case when area.normal_pick_area = 'Aerosol' then truevisits else 0 end) as aerosolvisit, 
      (case when area.normal_pick_area = 'Haz Shed' then trueqty else 0 end) as hazqty, 
      (case when area.normal_pick_area = 'Haz Shed' then truevisits else 0 end) as hazvisit, 
      (case when area.normal_pick_area = 'High Value' then trueqty else 0 end) as hvqty, 
      (case when area.normal_pick_area = 'High Value' then truevisits else 0 end) as hvvisit, 
      (case when area.normal_pick_area = 'HLOP' then trueqty else 0 end) as hlopqty, 
      (case when area.normal_pick_area = 'HLOP' then truevisits else 0 end) as hlopvisit, 
      (case when area.normal_pick_area = 'Pallet Live' then trueqty else 0 end) as plqty, 
      (case when area.normal_pick_area = 'Pallet Live' then truevisits else 0 end) as plvisit, 
      (case when area.normal_pick_area = 'APR' then trueqty else 0 end) as aprqty, 
      (case when area.normal_pick_area = 'APR' then truevisits else 0 end) as aprvisit, 
      (case when area.normal_pick_area = 'Miniload' then trueqty else 0 end) as miniloadqty, 
      (case when area.normal_pick_area = 'Miniload' then truevisits else 0 end) as miniloadvisit, 
      (case when area.normal_pick_area = 'APR 2' then trueqty else 0 end) as apr2qty, 
      (case when area.normal_pick_area = 'APR 2' then truevisits else 0 end) as apr2visit, 
      (case when area.normal_pick_area = 'APR Awkward' then trueqty else 0 end) as aprawkqty, 
      (case when area.normal_pick_area = 'APR Awkward' then truevisits else 0 end) as aprawkvisit 
     from (
      select 
       x_prod.normal_pick_area, 
       x_pick.pick_location, 
       (
       case when x_prod.normal_pick_area = 'TP' then 'Miniload' when x_prod.normal_pick_area = 'MTP' then 'Miniload' when x_prod.normal_pick_area = 'PL' then 'Pallet Live' when x_prod.normal_pick_area = 'HLOP' then 'HLOP' when x_prod.normal_pick_area = 'STILLAGE' then 'High Value' when x_prod.normal_pick_area = 'ZA' then 'Aerosol' when x_prod.normal_pick_area = 'ZH' then 'Haz Shed' when x_prod.normal_pick_area = 'APR' 
        and Substr(x_pick.pick_location, 3, 2) < '22' 
        and x_prod.bncd_awkward_item = 'YES' then 'APR Awkward' when x_prod.normal_pick_area = 'APR' 
        and Substr(x_pick.pick_location, 3, 2) < '22' 
        and x_prod.bncd_awkward_item = 'NO' then 'APR' when x_prod.normal_pick_area = 'APR' 
        and Substr(x_pick.pick_location, 3, 2) > '21' 
        and x_prod.bncd_awkward_item = 'NO' then 'APR 2' when x_prod.normal_pick_area = 'APR' 
        and Substr(x_pick.pick_location, 3, 2) > '21' 
        and x_prod.bncd_awkward_item = 'YES' then 'TD1' else 'Unknown' end 
       ) 
        from x_pick,x_prod) area, qtyvisit, 
         ((select sub1.loc_count,x_pick.pick_qty, 
          (case when sub1.loc_count < 2 then x_pick.pick_qty else x_pick.pick_qty/sub1.loc_count end) as trueqty, 
          (case when sub1.loc_count < 2 then 1 else 1/sub1.loc_count end) as truevisits 
        from x_pick,sub1) truev from 
       (
        select 
        x_pick.prod_code, 
        area.normal_pick_area, 
        Count(distinct (x_apr_loc.location)) as loc_count 
        from 
        x_apr_loc, 
        x_pick 
        where 
        x_apr_loc.prod_code(+) = x_pick.prod_code 
        group by 
        x_pick.prod_code)) sub1) 
        x_pick) 
     ) master 


where x_pick.prod_code(+) = sub1.prod_code 
    and x_pick.prod_code = x_apr_loc.prod_code(+) 
    and x_pick.prod_code = x_prod.prod_code 
    and x_pick.order_id = x_order.order_id 
    and x_pick.pick_state in (
     'RESERVED', 
     'WAIT REPLEN', 
     'STARTED' 
     ) 
    and x_order.order_state in (
     'RESERVED', 
     'STARTED' 
     ) 

你好， 我得到的是grandvisit是一個無效的標識錯誤，而且我不確定我是否會與其他標識符得到它的。任何光線都會讓人驚歎。因爲我不明白爲什麼它與其他人不同。

Answer 1

你不能在它產生相同select條款指的alias名。

SELECT Sum(aerosolvisit + hazvisit + hvvisit + hlopvisit 
      + plvisit + miniloadvisit + aprvisit + apr2visit 
      + aprawkvisit) AS grandvisit 

要計算grandratio您使用下面的表達式，使用別名grandvisit

SELECT CASE 
     WHEN Sum(grandtotal) = 0 THEN 0 
     WHEN Sum(grandvisit) = 0 THEN 0 
     ELSE Sum(grandtotal)/Sum(grandvisit) 
     END AS grandratio 

你可以使用派生表做到這一點

SELECT CASE 
     WHEN Sum(grandtotal) = 0 THEN 0 
     WHEN Sum(grandvisit) = 0 THEN 0 
     ELSE Sum(grandtotal)/Sum(grandvisit) 
     END AS grandratio 
From 
(
SELECT Sum(aerosolvisit + hazvisit + hvvisit + hlopvisit 
      + plvisit + miniloadvisit + aprvisit + apr2visit 
      + aprawkvisit) AS grandvisit 
... 
) A 

注：你是使用舊風格的外連接的（+=）。這是更好地使用Right/Left加入哪個更可讀