How to pipe MongoDB Data to CSV in PowerShell

The CData Cmdlets Module for MongoDB is a standard PowerShell module offering straightforward integration with MongoDB. Below, you will find examples of using our MongoDB Cmdlets with native PowerShell cmdlets.

Getting Started

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Creating a Connection to Your MongoDB Data

Set the Server, Database, User, and Password connection properties to connect to MongoDB. To access MongoDB collections as tables you can use automatic schema discovery or write your own schema definitions. Schemas are defined in .rsd files, which have a simple format. You can also execute free-form queries that are not tied to the schema.

$conn = Connect-MongoDB  -Server "$Server" -Port "$Port" -Database "$Database" -User "$User" -Password "$Password"

Selecting Data

Follow the steps below to retrieve data from the restaurants table and pipe the result into to a CSV file:

Select-MongoDB -Connection $conn -Table restaurants | Select -Property * -ExcludeProperty Connection,Table,Columns | Export-Csv -Path c:\myrestaurantsData.csv -NoTypeInformation

You will notice that we piped the results from Select-MongoDB into a Select-Object cmdlet and excluded some properties before piping them into an Export-Csv cmdlet. We do this because the CData Cmdlets append Connection, Table, and Columns information onto each "row" in the result set, and we do not necessarily want that information in our CSV file.

Deleting Data

The following line deletes any records that match the criteria:

Select-MongoDB -Connection $conn -Table restaurants -Where "Name = Morris Park Bake Shop" | Remove-MongoDB

Inserting and Updating Data

The cmdlets make data transformation easy as well as data cleansing. The following example loads data from a CSV file into MongoDB, checking first whether a record already exists and needs to be updated instead of inserted.

Import-Csv -Path C:\MyrestaurantsUpdates.csv | %{
  $record = Select-MongoDB -Connection $MongoDB -Table restaurants -Where ("_id = `'"+$_._id+"`'")
  if($record){
    Update-MongoDB -Connection $mongodb -Table restaurants -Columns ("borough","cuisine") -Values ($_.borough, $_.cuisine) -Where ("_id = `'"+$_._id+"`'")
  }else{
    Add-MongoDB -Connection $mongodb -Table restaurants -Columns ("borough","cuisine") -Values ($_.borough, $_.cuisine)
  }
}

As always, our goal is to simplify the way you connect to data. With cmdlets users can install a data module, set the connection properties, and start building. Download Cmdlets and start working with your data in PowerShell today!