PLSQL：在单个查询中获取一周中每一天的总和和一周的总和

比如说，我有一张桌子，ClientTrade，就像这样：

ClientName , TradeDate , Quantity

我想在Oracle PLSQL中创建一个查询，该查询将返回如下结果： 天数来自TradeDate列，Mon=sumQuantity代表Mon，Tue=sumQuantity代表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 

假设此报告始终具有使其运行一周的where条件，是否可以在单个查询中创建此报告

子查询

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

一种更干净，但可能效率更低的方法涉及到一个带有groupby:ew的视图

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：

这变得难看的原因是我们将行旋转为列

让我们看看：

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;

---

不整洁，但正如@tpdi在他的回答中提到的，这是因为我们将行旋转为列。我使用了一致的交易日期。。。条款涵盖相关周。

谢谢您的回答。实际上，我在plsql中发现了一些很好的结果：

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

---

只是简单一点

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

我在Oracle 11G上的试用：

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) )   

---

这很有趣——几乎每一次，人们都忘记给桌子命名。SQL问题95%一致。第一个表的名称始终为a；好啊干得好。在我看来，这并没有多大区别。但最好是5%：然而，与其他答案不同，它非常以pl/sql为中心。什么是pl/sql？这只是SQL。对你有效，但对我无效。在我的NLS设置中，日期被命名为MONTAG、DIENSTAG、MITTWOCH等。换句话说，您的解决方案取决于区域设置。

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) )