Question

我只想拥有与我的Excel工作表中具有不同ManufacturerPartNumber的行。

所以，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，则可行。并且它返回重复的行，我不想发生这些行。

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Excel表格

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

//这里AGBN514A出现了两次，在PenDrive和DataCard中出现

预期输出

Name        ManufacturerPartNumber      Price
PenDrive    AGBN514A                    5.4
HardDisk    NKDNKHS5                    9.6

//它应该省略ManufacturerPartNumbers

由于

Answer 1

Tsql有用吗？

我之前只见过像

这样的明显区别

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

更新

我刚注意到你错过了一个＆＃34; c＆＃34;来自DISTINCT。

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：

您正在尝试选择from test这是我的测试表。您将要替换您的工作表名称。

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？

1 个答案: