How to pipe Amazon DynamoDB Data to CSV in PowerShell

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

Creating a Connection to Your Amazon DynamoDB Data

The connection to Amazon DynamoDB is made using your AccessKey, SecretKey, and optionally your Domain and Region. Your AccessKey and SecretKey can be obtained on the security credentials page for your Amazon Web Services account. Your Region will be displayed in the upper left-hand corner when you are logged into DynamoDB.

$conn = Connect-AmazonDynamoDB  -Access Key "$Access Key" -Secret Key "$Secret Key" -Domain "$Domain" -Region "$Region"

Selecting Data

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

Select-AmazonDynamoDB -Connection $conn -Table Lead | Select -Property * -ExcludeProperty Connection,Table,Columns | Export-Csv -Path c:\myLeadData.csv -NoTypeInformation

You will notice that we piped the results from Select-AmazonDynamoDB 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-AmazonDynamoDB -Connection $conn -Table Lead -Where "FirstName = Bob" | Remove-AmazonDynamoDB

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 Amazon DynamoDB, checking first whether a record already exists and needs to be updated instead of inserted.

Import-Csv -Path C:\MyLeadUpdates.csv | %{
  $record = Select-AmazonDynamoDB -Connection $AmazonDynamoDB -Table Lead -Where ("Id = `'"+$_.Id+"`'")
  if($record){
    Update-AmazonDynamoDB -Connection $amazondynamodb -Table Lead -Columns ("Industry","Revenue") -Values ($_.Industry, $_.Revenue) -Where ("Id = `'"+$_.Id+"`'")
  }else{
    Add-AmazonDynamoDB -Connection $amazondynamodb -Table Lead -Columns ("Industry","Revenue") -Values ($_.Industry, $_.Revenue)
  }
}

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!