Question

我有2个csv文件我被要求合并，其中第一列的值匹配。两个文件都可能具有重复值，如果有，则应创建一个新行来支持这些值。如果未找到匹配项，则打印该值不匹配。

除了查找重复值，我使用以下代码...

Function GetFirstColumnNameFromFile
{
    Param ($CsvFileWithPath)

    $FirstFileFirstColumnTitle = ((Get-Content $CsvFileWithPath -TotalCount 2 | ConvertFrom-Csv).psobject.properties | ForEach-Object {$_.name})[0]
    Write-Output $FirstFileFirstColumnTitle
}

Function CreateMergedFileWithCsv2ColumnOneColumn
{
    Param ($firstColumnFirstFile, $FirstFileFirstColumnTitle, $firstFile, $secondFile, $resultsFile)

    Write-Host "Creating hash table with columns values `"Csv2ColumnOne`" `"Csv2ColumnTwo`" From $secondFile"
    $hashColumnOneColumnTwo2ndFile = @{}
    Import-Csv $secondFile | Where-Object {$firstColumnFirstFile -contains $_.'Csv2ColumnOne'} | ForEach-Object {$hashColumnOneColumnTwo2ndFile[$_.'Csv2ColumnOne'] = $_.Csv2ColumnTwo}
    Write-Host "Complete."

    Write-Host "Creating Merge file with file $firstFile
    and column `"Csv2ColumnTwo`" from file $secondFile"
    Import-Csv $firstFile | Select-Object *, @{n='Csv2ColumnOne'; e={
    if ($hashColumnOneColumnTwo2ndFile.ContainsKey($_.$FirstFileFirstColumnTitle)) {
        $hashColumnOneColumnTwo2ndFile[$_.$FirstFileFirstColumnTitle]
    } Else {
        'Not Found'
    }}} | Export-Csv $resultsFile -NoType -Force
    Write-Host "Complete."
}

Function MatchFirstTwoColumnsTwoFilesAndCombineOtherColumnsOneFile
{
    Param ($firstFile, $secondFile, $resultsFile)

    [string]$FirstFileFirstColumnTitle = GetFirstColumnNameFromFile $firstFile

    $FirstFileFirstColumn = Import-Csv $firstFile | Where-Object {$_.$FirstFileFirstColumnTitle} | Select-Object -ExpandProperty $FirstFileFirstColumnTitle

    CreateMergedFileWithCsv2ColumnOneColumn $FirstFileFirstColumn $FirstFileFirstColumnTitle $firstFile $secondFile $resultsFile
}

Function Main
{
    $firstFile = 'C:\Scripts\Tests\test1.csv'
    $secondFile = 'C:\Scripts\Tests\test2.csv'
    $resultsFile = 'C:\Scripts\Tests\testResults.csv'

    MatchFirstTwoColumnsTwoFilesAndCombineOtherColumnsOneFile $firstFile $secondFile $resultsFile
}

Main

第一个csv文件的内容是：

firstName,secondName
1234,Value1
2345,Value1
3456,Value1
4567,Value1
7645,Value3

第二个csv文件的内容是：

Csv2ColumnOne,Csv2ColumnTwo,Csv2ColumnThree
1234,abc,Value1
1234,asd,Value1
3456,qwe,Value1
4567,mnb,Value1

结果是：

"firstName","secondName","Csv2ColumnOne"
"1234","Value1","asd"
"2345","Value1","Not Found"
"3456","Value1","qwe"
"4567","Value1","mnb"
"7645","Value3","Not Found"

由于第二个文件的重复值为1234，因此结果文件应为：

"firstName","secondName","Csv2ColumnOne"
"1234","Value1","abc"
"1234","Value1","asd"
"2345","Value1","Not Found"
"3456","Value1","qwe"
"4567","Value1","mnb"
"7645","Value3","Not Found"

我有办法做到这一点吗？

比较和合并2个csv文件，基于2个第一列，可能有重复值

0 个答案: