按查询分组排序

Question

我正在尝试执行查询以显示按供应商 (Supp_Code) 分组的结果，然后在每个组中，结果为按佣金代码（Comm_Code）排序。

以下查询：

sql = "SELECT [Comm_Code], [Supp_Code], [AqYear], [Product_Code], [Type], [Customer_Code], " & _ "[Commission_Rate], [cType] FROM [Acquisition Commission] GROUP BY [Supp_Code] " & _ "ORDER BY [Comm_Code]" Dim da As New OleDbDataAdapter(sql, con) Dim ds As New DataSet Dim dt As New System.Data.DataTable da.Fill(ds)

报错：

You tried to execute a query that does not include the specified expression 'Comm_Code' as part of an aggregate function.

我查了一下，this answer 说这是因为我在 SELECT 中包括了 Comm_Code 而不是 GROUP BY.

所以，我将其更改为：

sql = "SELECT [Comm_Code], [Supp_Code], [AqYear], [Product_Code], [Type], [Customer_Code], " & _ "[Commission_Rate], [cType] FROM [Acquisition Commission] GROUP BY [Supp_Code] " & _ "ORDER BY [Comm_Code]"

但后来我得到了同样的错误，但是 AqYear 字段。

这将一直持续到我在 GROUP BY 子句中包含所有选定的字段...当然这会给我错误的输出，但即使没有，看起来也有很多不必要的查询。

是否有 faster/better 方法来实现我的目标？还是我只需要在 GROUP BY 子句中包含每个查询？

Answer 1

我认为您只是在寻找具有两个 ORDER BY 键的非聚合查询：

SELECT [Comm_Code], [Supp_Code], [AqYear], [Product_Code], [Type], [Customer_Code], 
       [Commission_Rate], [cType]
FROM [Acquisition Commission] 
ORDER BY [Supp_Code], [Comm_Code];

具有 GROUP BY 的查询通常具有聚合函数，例如 COUNT() 或 SUM()。

Answer 2

-- group by Id & order by Name

    SELECT  id, name, dob  FROM  test  GROUP BY  id   ORDER BY  name

试试这样的东西..

干杯！！

按查询分组排序

Ordering By a Group By Query

sql

ms-access

select

group-by

sql-order-by