Question

我正在尝试创建一个查询，该查询将显示每笔销售的详细信息以及另一列，该列将显示订单创建当天发生的每日总销售额（创建日期）

我有两个查询可以提供所需的信息，但我无法合并它们。我相信LEFT JOIN SELECT语句是实现这一目标所必需的。

### Query that displays order details ###

SELECT DISTINCT
Tracking.ID,
Tracking.CreationDate,
Tracking.CurrentAssignedDriverID, 
Tracking.TotalCost, 
Tracking.CustomerID, 
Tracking.dFrom, 
Tracking.dTo,
(SELECT Company FROM Customers WHERE Customers.ID = CustomerID)
FROM Tracking

### Query that yields daily totals ###

SELECT 
CAST(convert(char(10), Tracking.CreationDate, 101) AS smalldatetime),
Tracking.TotalCost

FROM

Tracking

GROUP BY

CAST(convert(char(10), Tracking.CreationDate, 101) AS smalldatetime),
Tracking.TotalCost

Answer 1

您可以在一个查询中获取所有信息，如下所示：

SELECT  Tracking.ID,
        Tracking.CreationDate,
        Tracking.CurrentAssignedDriverID, 
        Tracking.TotalCost, 
        Tracking.CustomerID, 
        Tracking.dFrom, 
        Tracking.dTo,
        Customers.Company,
        SUM(Tracking.TotalCost) OVER(PARTITION BY CAST(convert(char(10), Tracking.CreationDate, 101) AS smalldatetime))
        AS TotalSales
  FROM  Tracking INNER JOIN Customers 
      ON    Customers.ID = Tracking.CustomerID

SQL：LEFT JOIN SELECT STATEMENT添加“Daily Sales Total”列

1 个答案: