Script to merge multiple CSV files together with no duplicate records.

Question

I like a Script to merge multiple CSV files together with no duplicate records.
None of the files have any headers and column A got a unique ID. What would be the best way to accomplish that?

Answer 1

OK here is my answer :
2 files in a directory with no headers.
first column is the unique ID, second colomun you put whatever u want
The headers are added when using the import-csv cmdlet
first file contains :
1;a
2;SAMEID-FIRSTFILE
3;c
4;d
5;e
second file contains :
6;a
2;SAMEID-SECONDFILE
7;c
8;d
9;e
the second file contains the line : 2;b wich is the same in the first file
the code :
$i = 0
Foreach($file in (get-childitem d:\yourpath)){
if($i -eq 0){
$ref = import-csv $file.fullname -Header id,value -Delimiter ";"
}else{
$temp = import-csv $file.fullname -Header id,value -Delimiter ";"
foreach($line in $temp){
if(!($ref.id.contains($line.id))){
$objet = new-object Psobject
Add-Member -InputObject $objet -MemberType NoteProperty -Name id -value $line.id
Add-Member -InputObject $objet -MemberType NoteProperty -Name value -value $line.value
$ref += $objet
$i++
$ref
$ref should return:
id                                                         
value
1                                                          
a
2                                                          
SAMEID-FIRSTFILE
3                                                          
c
4                                                          
d
5                                                          
e
6                                                          
a
7                                                          
c
8                                                          
d
9                                                          
e
(get-childitem d:\yourpath) -> yourpath containing the 2 csv file