Question

使用此查询时，我有一个我想要的结果，但我需要合并Beer.Name实例。这样，当我想将CustomerID和Beer.Name合并为单个实体时，我的输出中有多个Beer.Name及其数量的条目。我该怎么做？

SELECT C.CustomerID, Beer.Name,sum (quantitysupplied)as 'Total Quantity'
FROM Customer C
INNER JOIN CustomerOrder
    ON C.CustomerID = CustomerOrder.CustomerID 
INNER JOIN CustomerOrderLine
    ON CustomerOrderLine.CustomerOrderID = CustomerOrder.CustomerOrderID 
INNER JOIN Product
    ON CustomerOrderLine.ProductID =Product.ProductID 
INNER JOIN Beer
    ON Product.BeerID = Beer.BeerID
GROUP BY C.CustomerID, Beer.Name, CustomerType
HAVING CustomerType LIKE 'C'

谢谢。

这是输出：

      CustomerID  Name                           Total Quantity
 ----------- ------------------------------ --------------
  1001        Ale Heads                      11
 1002        Ale Heads                      8
  1003        Ale Heads                      13
  1004        Ale Heads                      3
  1006        Ale Heads                      4
  1007        Ale Heads                      14
  1008        Ale Heads                      4
 1009        Ale Heads                      4

这很长，但这很有代表性，我希望只有一个啤酒名称和客户ID的实例合并到其他地方。

Answer 1

这就是你想要的吗？

SELECT CAST(C.CustomerID AS varchar) + ': ' + Beer.Name AS CustomerBeer, Sum(quantitysupplied) AS 'Total Quantity'
FROM etc.

SQL：字段合并

1 个答案: