![]() PowerShell version 3 or up is recommended. They have parameters to handle some of the filtering you would do with Where-Object using my function. It only handles two CSV files / custom PS objects at a time. Since writing this I also found out about Join-Object, written by the PowerShell team. It has been published to the PowerShell gallery here and is also on GitHub here. Since Import-Csv turns stuff into custom PowerShell objects, and this script works with those objects, I suppose the function could more accurately have been named "Merge-Object", but there it is. Have an object with a ComputerName property and a CSV file with a ComputerName property - and you want to "join" them? Throw Merge-Csv at them and marvel. You have probably needed it - or been in a position where it would have been useful - several times before without even realizing. The code is not very efficient, but provides extreme convenience in certain situations. The most typical scenario will be using only one ID column, such as a username that's common in two or more files, and you want for instance everything from one CSV file joined with a separate CSV file that has some info that's missing in the other one, and you want the username (or some other ID field - or fields) to be the thing(s) that tie(s) it together. If you have two or more CSV files (or custom PowerShell objects) that share one or more columns/headers/properties, and you want to merge them based on this or these properties, say hello to Merge-Csv. Example of Merging Three Files Based on Two ID Columns.Merge CSV files or PSObjects in PowerShell - Svendsen Tech Jump to page sections
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