Compare Two CSVs, match the columns on 2 or more Columns, export specific columns from both csvs with powershell

Question

i Have 2 CSV\'s

left.csv

Ref_ID,First_Name,Last_Name,DOB
321364060,User1,Micah,11/01/1969
946497594,User2,Acker,05/28/1960
887327716,User3,Aco,06/26/1950         


        

Answer 1

$left = Import-Csv C:\left.csv
$right = Import-Csv C:\right.csv

Compare-Object -ReferenceObject $left -DifferenceObject $right -Property First_Name,Last_Name,DOB -IncludeEqual -ExcludeDifferent | 
    ForEach-Object {
        $iItem = $_
        $ileft = $left.Where({$_.First_Name -eq $iItem.First_Name -and $_.Last_Name -eq $iItem.Last_Name -and$_.DOB -eq $iItem.DOB})
        $iright = $right.Where({$_.First_Name -eq $iItem.First_Name -and $_.Last_Name -eq $iItem.Last_Name -and$_.DOB -eq $iItem.DOB})
        [pscustomobject]@{
            Ref_ID=$ileft.Ref_ID
            first_name=$ileft.first_name
            last_name=$ileft.last_name
            DOB=$ileft.DOB
            Document_Type=$iright.Document_Type
            Filename=$iright.Filename
        }
    } | Export-Csv C:\Combined.csv -NoTypeInformation