GroupBy Parameter (Select-CSV Cmdlet)
A comma-separated list of columns that the result set will be grouped by.
Syntax
Select-CSV -GroupBy string
Remarks
The comma-separated list of columns to aggregate the values of and execute a summary function over. Specify the summary function in the Columns parameter with the same syntax you would use for an SQL statement. For example:
Select-CSV -Connection $conn -Table NorthwindOData -Columns @("Username","SUM(AnnualRevenue)") -GroupBy "Username" -Where "Email = '[email protected]'"