Question

我只需点击一下即可完成任务，所以任何帮助都会很棒我有这个我在Oracle中编写的sql代码：

   SELECT DISTINCT 
          O.shipcountry, S.companyname,
          O.orderid,
          TO_CHAR(O.freight, '$999,999.999'), 
          TO_CHAR(sum(unitprice)*count(quantity), '$999,999.99') as "Order Total"
     FROM corp.Order_Details D
LEFT JOIN corp.Orders O ON D.orderid = O.orderid)
LEFT JOIN corp.Shippers S ON O.shipvia = S.Shipperid
    WHERE O.freight >= '500'
 GROUP BY O.shipcountry, S.companyname, O.orderid, to_char(O.freight, '$999,999.999');

这基本上给了我一个orderid，运到的国家，托运人名称，订单总额以及收取的运费总额。

问题

如果不太复杂，有没有人知道我如何写出运费的百分比（运费/订单总额）？我试图把它放进去，但它说它不能被分组，因为总和的总和。如果有人对我应该如何以及在哪里写这一行有任何想法，我真的非常感谢。

Answer 1

因此...

SELECT DISTINCT 
       O.shipcountry, 
       S.companyname, 
       O.orderid,
       TO_CHAR(O.freight, '$999,999.999'), 
       TO_CHAR(SUM(unitprice) * COUNT(quantity), '$999,999.99') as "Order Total", 
       O.freight / (SUM(unitprice) * COUNT(quantity)) as "Percent"
   ...

......不起作用？

Answer 2

我认为您的意思是您添加了O.freight / (SUM(unitprice) * COUNT(quantity))之类的内容并获得了ORA-00979: not a GROUP BY expression。

原因是O.freight不是您的GROUP BY表达式之一 - 您按to_char(O.freight, '$999,999.999')进行分组。您应该能够单独按列值进行分组并使其有效。

  SELECT DISTINCT 
          O.shipcountry, S.companyname,
          O.orderid,
          TO_CHAR(O.freight, '$999,999.999'), 
          TO_CHAR(sum(unitprice)*count(quantity), '$999,999.99') as "Order Total",
          O.freight / (SUM(unitprice) * COUNT(quantity)) as "Percent"
     FROM corp.Order_Details D
LEFT JOIN corp.Orders O ON D.orderid = O.orderid)
LEFT JOIN corp.Shippers S ON O.shipvia = S.Shipperid
    WHERE O.freight >= '500'
 GROUP BY O.shipcountry, S.companyname, O.orderid, O.freight;

我怀疑一个常见的误解是GROUP BY子句中的表达式必须与SELECT子句中未分组的表达式完全匹配。按实际值分组就足够了 - 您仍然可以在选择中将功能应用于它们。

查找Oracle中列之间的百分比

问题

2 个答案: