Скачать или смотреть How to Copy CSV Values Using PowerShell from One File to Another Based on Email Matching

Learn how to seamlessly copy matching CSV values from one file to another using PowerShell, focusing on email address alignment.
---
This video is based on the question https://stackoverflow.com/q/66813030/ asked by the user 'readyrockc' ( https://stackoverflow.com/u/15281571/ ) and on the answer https://stackoverflow.com/a/66815725/ provided by the user 'Theo' ( https://stackoverflow.com/u/9898643/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Copy CSV values from one CSV file to matching CSV values of another file

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Introduction: The Need for Data Synchronization

In today’s data-driven environment, managing and synchronizing information across CSV files is a common task. Whether you're in IT, project management, or data analysis, you might find yourself needing to copy data from one CSV file to another based on a specific matching criterion.

For example, you might have two CSV files containing user information and contact details. In this guide, we’ll explore a straightforward PowerShell script to copy phone numbers from one CSV file to another using a common column: EmailAddress.

Understanding the Scenario

Let’s break down the structure of the two CSV files you are working with:

users.csv: This CSV is a result of a Get-ADUser export and has the following headers:

SamAccountName

DisplayName

Surname

GivenName

telephoneNumber

EmailAddress

addressbook.csv: This CSV contains an export of your organization’s address book with the following headers:

RoomNr

Name

TelNr

Cordless

Fax

Department

Title

EmailAddress

The Goal

Your objective is to copy the TelNr value from addressbook.csv to users.csv where the EmailAddress fields match. Let's check out the PowerShell script you proposed and see how to make it work.

The PowerShell Solution

Here’s an improved version of your original PowerShell script that achieves the desired outcome.

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Script

Importing CSV Files:

Use Import-Csv to load both CSV files into variables $users and $addressbook, specifying the correct delimiter as ;.

Processing Each Record:

Loop through each record in the $users array.

Capture the EmailAddress for each user.

Use Where-Object to search for the matching email in the $addressbook and assign the corresponding TelNr to telephoneNumber.

Outputting the Results:

Finally, use Export-Csv to save the updated $users object array to a new file called UsersComplete.csv. The -NoTypeInformation parameter prevents PowerShell from adding extra type information to the CSV file.

Common Issues to Watch For

Ensure that the file paths provided for both the Import-Csv and Export-Csv commands are correct.

Verify that the CSV files contain the expected headers and data formats.

Check for any issues with empty or mismatched email addresses which may cause incorrect matching.

Conclusion

With this straightforward approach, you can easily copy phone numbers from one CSV file to another based on matching email addresses. This not only streamlines your data management but also minimizes manual errors.

By following the provided script, you can efficiently accomplish your data synchronization tasks using PowerShell.

Are there any other scenarios where you might need to synchronize data between CSV files? Share your thoughts in the comments below!