Powershell 基于列值将CSV行转换为列

我正在尝试将一个包含30列的80K行数据csv转换为基于原始csv中特定列数据的排序和过滤csv

例如，我的数据采用以下格式：

PatchName   MachineName IPAddress       DefaultIPGateway    Domain Name USERID          UNKNOWN NOTAPPLICABLE   INSTALLED   APPLICABLE  REBOOTREQUIRED  FAILED
KB456982    XXX1002     xx.yy.65.148    xx.yy.64.1          XYZ.NET     XYZ\ayzuser     YES     
KB589631    XXX1003     xx.yy.65.176    xx.yy.64.1          XYZ.NET     XYZ\cdfuser             YES
KB456982    ABC1004     xx.zz.83.56     xx.zz.83.1          XYZ.NET     XYZ\mnguser     YES
KB456982    8797XCV     xx.yy.143.187   xx.yy.143.184       XYZ.NET     WPX\abcuser                                                                     YES

在这里，MachineName将被过滤到Uniq，PatchName将转置到最后一列标题，如果出现“是”，则保留“未知、不适用、已安装、失败、重新启动需要的列”值-

预期结果：

MachineName IPAddress       DefaultIPGateway    Domain Name USERID          KB456982 KB589631 
XXX1002     xx.yy.65.148    xx.yy.64.1          XYZ.NET     XYZ\ayzuser     UNKNOWN  
XXX1003     xx.yy.65.176    xx.yy.64.1          XYZ.NET     XYZ\cdfuser              NOTAPPLICATBLE
ABC1004     xx.zz.83.56     xx.zz.83.1          XYZ.NET     XYZ\mnguser     UNKNOWN
8797XCV     xx.yy.143.187   xx.yy.143.184       XYZ.NET     WPX\abcuser     FAILED      

寻找帮助来实现这一点，到目前为止，我能够将PathcName行转置到列，但无法包括所有列以及应用条件。[处理此问题需要40分钟]

$b = @()
    foreach ($Property in $a.MachineName | Select -Unique) {
        $Props = [ordered]@{ MachineName = $Property }
        foreach ($Server in $a.PatchName | Select -Unique){ 
            $Value = ($a.where({ $_.PatchName -eq $Server -and $_.MachineName -eq $Property })).NOTAPPLICABALE
            $Props += @{ $Server = $Value }
        }
        $b += New-Object -TypeName PSObject -Property $Props
    }

---

这就是我想到的：

$data = Import-Csv -LiteralPath 'C:\path\to\data.csv'

$lookup = @{}
$allPatches = $data.PatchName | Select-Object -Unique

# Make 1 lookup entry for each computer, to keep the username and IP and so on.
# Add the patch details from the current row (might add more than one patch per computer)
foreach ($row in $data)
{
    if (-not $lookup.ContainsKey($row.MachineName))
    {     
        $lookup[$row.MachineName] = ($row | Select-Object -Property MachineName, IPAddress, DefaultIPGateway, DomainName, UserID)
    }

    $patchStatus = $row.psobject.properties | 
            Where-Object {
                $_.name -in @('applicable', 'notapplicable', 'installed', 'rebootrequired', 'failed', 'unknown') -and 
                -not [string]::IsNullOrWhiteSpace($_.value)
            } | 
            Select-Object -ExpandProperty Name

    $lookup[$row.MachineName] | Add-Member -NotePropertyName $row.PatchName -NotePropertyValue $patchStatus

}

# Pull the computer details out of the lookup, and add all the remaining patches
# so they will convert to CSV properly, then export to CSV
$lookup.Values | ForEach-Object {
    $computer = $_
    foreach ($patch in $allPatches | where-object {$_ -notin $computer.psobject.properties.name})
    {
        $computer | Add-Member -NotePropertyName $patch -NotePropertyValue ''
    }
    $computer
} | Export-Csv -LiteralPath 'c:\path\to\output.csv' -NoTypeInformation

---

请注意，流的第一个对象上应存在所有属性，否则下一个cmdlet将无法获取（或显示）这些属性。请参阅：非常感谢您的响应，我对最近的评论表示歉意-下面是我收到的错误-

Add Member:无法添加名为“KB4057117”的成员“因为具有该名称的成员已存在。若仍要覆盖该成员，请将Force参数添加到命令中。在第22行字符：33+…hineName]|添加成员-NotePropertyName$row.PatchName-NoteProperty+CategoryInfo:InvalidOperation:（@{MachineName=A..U KB4057117=}:PSObject）[添加成员]，InvalidOperationException+FullyQualifiedErrorId:MemberAlreadyExists，Microsoft.PowerShell.Commands.AddMemberCommand

我刚刚抑制了错误

-ErrorAction SilentlyContinue

-它正在按预期生成数据，现在我将在180万行上运行此命令：）