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

Try this Join-Object.
It has a few more features along with joining based on multiple columns:

$Left = ConvertFrom-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
588496260,User4,John,05/23/1960
565465465,User5,Jack,07/08/2020
"@

$Right = ConvertFrom-Csv @"
First_Name,Last_Name,DOB,City,Document_Type,Filename
User1,Micah,11/01/1969,Parker,Transcript,T4IJZSYO.pdf
User2,Acker,05/28/1960,,Transcript,R4IKTRYN.pdf
User3,Aco,06/26/1950,,Transcript,R4IKTHMK.pdf
User4,John,05/23/1960,,Letter,R4IKTHSL.pdf
"@

$Left | Join $Right `
    -On First_Name, Last_Name, DOB `
    -Property Ref_ID, Filename, First_Name, DOB, Last_Name `
    | Format-Table

Last_Name    Ref_ID DOB                    Filename     First_Name
---------    ------ ---                    --------     ----------
Micah     321364060 1969-11-01 12:00:00 AM T4IJZSYO.pdf User1
Acker     946497594 1960-05-28 12:00:00 AM R4IKTRYN.pdf User2
Aco       887327716 1950-06-26 12:00:00 AM R4IKTHMK.pdf User3
John      588496260 1960-05-23 12:00:00 AM R4IKTHSL.pdf User4