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To divide a CSV file into several plain text files in PowerShell, you can use the following method:

1. Import the CSV file using the Import-CSV cmdlet:

$csv = Import-CSV "C:\path\to\file.csv"

1. Use the Group-Object cmdlet to group the data by a specific column:

$groups = $csv | Group-Object -Property ColumnName

Make sure to replace ColumnName with the name of the column you want to group by.

1. Use a loop to iterate over the groups and export each group to a separate plain text file using the Export-Csv cmdlet:

foreach ($group in $groups) {
    $filename = "C:\path\to\output\file_$($group.Name).txt"
    $group.Group | Export-Csv -Path $filename -NoTypeInformation -Delimiter " "
}

Make sure to replace "C:\path\to\output" with the path where you want to save the plain text files. The $group.Name variable will be used to create a unique filename for each group.

1. Run the PowerShell script to divide the CSV file into several plain text files.