PLSQL：在一個查詢中獲取一周中每一天的總和和一周的總和

Question

比方說，我有一個表ClientClde，就像這樣：

ClientName , TradeDate , Quantity

我想在Oracle PLSQL中創建一個查詢，它應該返回如下結果:(天數來自TradeDate列，Mon = sum（數量）表示Mon，Tue = sum（Quantity）表示Tue ......等等。 ）

ClientName  Mon Tue Wed Thu Fri Sat Sun TotalForWeek
ABC         10  15  5   2   4   0   0   34
XYZ         1   1   2   1   2   0   0   7 

假設此報告始終具有使其運行一周的條件，是否可以在單個查詢中創建此報告？

Answer 1

只是簡化一下......

SELECT ClientName, 
       SUM(CASE WHEN to_char(TradeDate,'DY')='MON' THEN Quantity ELSE NULL END) AS Mon,
       SUM(CASE WHEN to_char(TradeDate,'DY')='TUE' THEN Quantity ELSE NULL END) AS Tue,
       SUM(CASE WHEN to_char(TradeDate,'DY')='WED' THEN Quantity ELSE NULL END) AS Wed,
       SUM(CASE WHEN to_char(TradeDate,'DY')='THU' THEN Quantity ELSE NULL END) AS Thu,
       SUM(CASE WHEN to_char(TradeDate,'DY')='FRI' THEN Quantity ELSE NULL END) AS Fri,
       SUM(CASE WHEN to_char(TradeDate,'DY')='SAT' THEN Quantity ELSE NULL END) AS Sat,
       SUM(CASE WHEN to_char(TradeDate,'DY')='SUN' THEN Quantity ELSE NULL END) AS Sun,
       SUM(Quantity) AS TotalForWeek
FROM  ClientTrade
GROUP BY ClientName

Answer 2

子查詢。

select ClientName, 
(select sum(b.quantity) 
from table b where b.clientName = a.clientname 
and b.tradedate = [some constant or calculation that identifies monday])  
as Mon,
(select sum(b.quantity) 
from table b where b.clientName = a.clientname 
and b.tradedate = [some constant or calculation that identifies tuesday])  
as Tue,

..etc..
from table a

一種更清潔，但效率可能更低的方式涉及一個群組的視圖：ew

create view quantityperday as
select clientname, 
tradedate, 
dayofweek(tradedate) as dow, 
weekofyear(tradedate) as woy, 
year(tradedate) as y,
sum(quantity) as quantity
from table 
group by clientname, tradedate;

然后：

select clientname, b.quantity as Mon, c.quantity as Tue ....
from table a join quantityperday b 
on (a.clientname = b.clientname and b.y = '2008'
and b.doy = 2 and b.dow = 'Monday')
quantityperday c 
on (a.clientname = c.clientname and c.y = '2008'
and c.doy = 2 and c.dow = 'Tuesday')
join ....

這變得丑陋的原因是我們將行轉換為列。

Answer 3

讓我們來看看：

SELECT Client, MonSum, TueSum, WedSum, ThuSum, FriSum, SatSum, SunSum, TotSum
    FROM (SELECT ClientName AS Client, SUM(Quantity) AS MonSum
             FROM Trades
             WHERE DayOfWeek(TradeDate) = 'Monday'
               AND TradeDate BETWEEN DATE '..Monday..' AND DATE '..Sunday..'
             GROUP BY ClientName
         ) AS MonData
         JOIN
         (SELECT ClientName AS Client, SUM(Quantity) AS TueSum ...
         ) AS TueData ON Mondata.Client = TueData.Client
         JOIN
         ...
         (SELECT ClientName AS Client, SUM(Quantity) AS TotSum
             FROM Trades
             WHERE TradeDate BETWEEN DATE '..Monday..' AND DATE '..Sunday..'
             GROUP BY ClientName
         ) AS TotData ON MonData.Client = TotData.Client
    ORDER BY Client;

不整潔，但正如@tpdi在他的回答中提到的，那是因為我們將行轉移到列中。 我使用了一致的TradeDate BETWEEN ...條款來涵蓋相關的一周。

Answer 4

謝謝你的回答。 實際上，我在plsql中發現了一些很好用的東西：

select clientname,
max(decode(trim(dow),'MONDAY',totalquantity,0)) Mon,
max(decode(trim(dow),'TUESDAY',totalquantity,0)) Tue,
max(decode(trim(dow),'WEDNESDAY',totalquantity,0)) Wed,
max(decode(trim(dow),'THURSDAY',totalquantity,0)) Thu,
max(decode(trim(dow),'FRIDAY',totalquantity,0)) Fri,
(
max(decode(trim(dow),'MONDAY',totalquantity,0)) +
max(decode(trim(dow),'TUESDAY',totalquantity,0)) +
max(decode(trim(dow),'WEDNESDAY',totalquantity,0)) +
max(decode(trim(dow),'THURSDAY',totalquantity,0)) +
max(decode(trim(dow),'FRIDAY',totalquantity,0)) 
) TOTAL
from 
(
  select clientname, 
  to_char(tradedate, 'DAY') as dow, 
  sum(quantity) as totalquantity
  from ClientTrade a
  where a.tradedate >= trunc(sysdate-7,'D')
  and a.tradedate <= trunc(sysdate-7,'D') + 4
  group by c.clientshortname, tradedate
)
group by clientname

Answer 5

我嘗試使用Oracle 11G：

select clientname, nvl(MON,0) MON,  nvl(TUE,0) TUE, nvl(WED,0) WED, nvl(THU,0) THU, nvl(FRI,0) FRI, nvl(SAT,0) SAT, nvl(SUN,0) SUN,
nvl(MON,0) +  nvl(TUE,0) + nvl(WED,0) + nvl(THU,0) + nvl(FRI,0) +nvl(SAT,0) + nvl(SUN,0) TotalForWeek
from 
(
select   clientname,to_char(tradedate,'Dy') dw, sum(quantity) quantity from ClientTrade
group by clientname,  to_char(tradedate,'Dy')
)
pivot (sum(quantity) FOR dw in ('Mon' as MON,'Tue' as TUE,'Wed' AS WED,'Thu' AS THU,'Fri' AS FRI,'Sat' AS SAT,'Sun' AS SUN) )