Question

我对当前联接有问题。出于某些原因，聚合函数返回的金额不正确。当我运行以下查询时，结果中没有任何行：

 SELECT 
   CONCAT( pp.FirstName, ' ', pp.LastName) AS 'CustomerName', 
   ssoh.Status AS 'OrderStatus',
   FORMAT (ssoh.OrderDate, 'yyyy-dd-MM') AS OrderDate, ItemCount, AvgQty
 FROM Sales.SalesOrderHeader AS ssoh
 JOIN Person.Person AS pp ON pp.BusinessEntityID = ssoh.CustomerID
 JOIN ( 
   SELECT SalesOrderID, SUM(ssod.OrderQty) AS ItemCount, AVG(ssod.OrderQty) AS AvgQty
   FROM Sales.SalesOrderDetail AS ssod
   GROUP BY ssod.SalesOrderID
   HAVING SUM(ssod.OrderQty) > 300 
 ) AS ssod ON ssoh.SalesOrderID = ssod.SalesOrderID
 ORDER BY ssod.ItemCount DESC

当我分别运行此查询时：

Select SUM(OrderQty), SalesOrderID
From Sales.SalesOrderDetail
Where SUM(OrderQty) > 300
Group BY SalesOrderID
Order by desc
go

我得到一些行，这意味着我的思维方式没有错，并且我在脚本中犯了一个错误。请帮帮我。

Answer 1

您需要使用不在此处的位置：

Select SUM(OrderQty) as s, SalesOrderID
From Sales.SalesOrderDetail
Group BY SalesOrderID
HAVING SUM(OrderQty) > 300
Order by s desc

编辑以获取在SQL Server上工作的命令

SELECT x.s, x.salesorderid
FROM (
  Select SUM(OrderQty) as s, SalesOrderID
  From Sales.SalesOrderDetail
  Group BY SalesOrderID
  HAVING SUM(OrderQty) > 300
) x
Order by x.s desc

由于某些原因，聚集功能在连接中无法正常工作

1 个答案: