Question

我正在运行一个查询，需要连接2个表，即Order表和OrderItem。当我加入它们时，它将在OrderItem表中为每个产品创建一行。我只需要OrderItem来检查一列是否有值。如何将结果分组以仅显示一个OrderId？

SELECT a.[Id]
  ,CustomerId
      ,OrderTotal
      ,ShippingMethod
  ,AffiliateId
  ,OrderDiscount
  ,OrderSubTotalDiscountInclTax
 -- , b.DiscountAmountInclTax

  FROM Order a JOIN OrderItem b ON  a.Id = b.OrderId
  WHERE AffiliateId = 11 AND b.DiscountAmountInclTax = 0.0000 AND OrderSubTotalDiscountInclTax = 0.0000 AND OrderDiscount = 0.0000 AND OrderStatusId = 30 AND CreatedOnUtc > '2018-07-01'
  ORDER BY a.Id DESC

这将返回

Id   CustomerId    OrderTotal    xxx    xxx    xxx    xxx
1        1             5.00       x      x      x      x
1        1             5.00       x      x      x      x
2        2             5.00       x      x      x      x
2        2             5.00       x      x      x      x

我想按ID或OrderId分组

Id   CustomerId    OrderTotal    xxx    xxx    xxx    xxx
1        1             5.00       x      x      x      x
2        2             5.00       x      x      x      x

我知道这可能是一个无聊的问题，在此先感谢您的帮助。

Answer 1

添加一个分组依据，应该为您工作，尽管通常情况下，您可能希望执行sum（）使其有意义。

  SELECT a.[Id]
  ,CustomerId
      ,OrderTotal
      ,ShippingMethod
  ,AffiliateId
  ,OrderDiscount
  ,OrderSubTotalDiscountInclTax
 -- , b.DiscountAmountInclTax

  FROM Order a JOIN OrderItem b ON  a.Id = b.OrderId
  WHERE AffiliateId = 11 AND b.DiscountAmountInclTax = 0.0000 AND OrderSubTotalDiscountInclTax = 0.0000 AND OrderDiscount = 0.0000 AND OrderStatusId = 30 AND CreatedOnUtc > '2018-07-01'
  ORDER BY a.Id DESC
  group by a.id

Answer 2

只需添加distinct

SELECT distinct a.[Id] , CustomerId ,OrderTotal ,ShippingMethod ,AffiliateId ,OrderDiscount ,OrderSubTotalDiscountInclTax -- , b.DiscountAmountInclTax 
FROM Order a 
JOIN OrderItem b
  ON a.Id = b.OrderId 
WHERE AffiliateId = 11 AND b.DiscountAmountInclTax = 0.0000 AND 
OrderSubTotalDiscountInclTax = 0.0000 AND OrderDiscount = 0.0000 AND OrderStatusId = 30 AND
 CreatedOnUtc > '2018-07-01' ORDER BY a.Id DESC

Answer 3

尝试类似的方法，我没有数据库和数据，但是您可以尝试执行以下步骤（将查询分为几个小步骤）

首先执行查询以按OrderId获取“订单”总计组，我认为一个订单与客户之间是一对一的关系





使用OrderID与订单表进行联接

此后，您可以在查询中添加订单或位置

    SELECT a.[Id],
            ,CustomerId
      ,OrderTotal
      ,ShippingMethod
  ,AffiliateId
  ,OrderDiscount
  ,OrderSubTotalDiscountInclTax

  FROM Order a JOIN (SELECT SUM(ItemTotalPrice),
                              CustomerId
                              ,ShippingMethod
                              ,AffiliateId
                              ,OrderDiscount
                               ,OrderSubTotalDiscountInclTax
                      GROUP BY b.OrderId) B
  ON  a.Id = b.OrderId

致谢

需要帮助将查询分组

3 个答案: