如何编写 OleDbCommand 以仅获取不同的行？

Question

我只想拥有与我的 excel sheet.

具有不同 ManufacturerPartNumber 的行

因此，我给出了这样的命令文本：

cmdExcel.CommandText = "SELECT Name, DISTINT [ManufacturerPartNumber],Price From [" + SheetName + "] WHERE [ManufacturerPartNumber] IS NOT NULL";

但这不起作用，如果我将 DISTINCT [ManufacturerPartNumber] 更改为 ManufacturerPartNumber，它就会起作用。它 returns 重复了我不想发生的行。

这是我得到的错误：

An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred

Additional information: Syntax error (missing operator) in query expression 'DISTINCT [ManufacturerPartNumber]'.

示例数据

我的Excelsheet

Name        ManufacturerPartNumber      Price
PenDrive    AGBN514A                    5.4
HardDisk    NKDNKHS5                    9.6
DataCard    AGBN514A                    6.3

//这里AGBN514A出现了两次，分别在PenDrive和DataCard

预期输出

Name        ManufacturerPartNumber      Price
PenDrive    AGBN514A                    5.4
HardDisk    NKDNKHS5                    9.6

//应省略 ManufacturerPartNumbers

谢谢

Answer 1

Tsql 能用吗？

我以前只见过这么用过distinct

SELECT DISTINCT Name, [ManufacturerPartNumber],Price From ...

更新

而且我刚刚注意到您缺少来自 DISTINCT 的 "c"。

更新 2：

试试这个 SQL:

select Name, [ManufacturerPartNumber],Price 
from (
   select Name, [ManufacturerPartNumber],Price ,
      row_number() over (partition by [ManufacturerPartNumber] order by     [ManufacturerPartNumber]) as row_number
   from  test
   ) as rows
where row_number = 1

更新 3：

你正在尝试 select from test 这是我的测试 table。您需要替换工作表名称。

cmdExcel.CommandText = "select Name, [ManufacturerPartNumber],Price from ( select Name, [ManufacturerPartNumber],Price , row_number() over (partition by [ManufacturerPartNumber] order by [ManufacturerPartNumber]) as row_number from  [" + SheetName + "]) as rows where row_number = 1"

如何编写 OleDbCommand 以仅获取不同的行？

How to write OleDbCommand to get only distinct rows?

c#

excel

oledb