How to pipe Teradata Data to CSV in PowerShell

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

Creating a Connection to Your Teradata Data

To connect to Teradata, provide authentication information and specify the database server name.

• User: Set this to the username of a Teradata user.
• Password: Set this to the password of the Teradata user.
• DataSource: Specify the Teradata server name, DBC Name, or TDPID.
• Port: Specify the port the server is running on.
• Database: Specify the database name. If not specified, the default database is used.

$conn = Connect-Teradata -User "$User" -Password "$Password" -Server "$Server" -Database "$Database"

Selecting Data

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

Select-Teradata -Connection $conn -Table NorthwindProducts | Select -Property * -ExcludeProperty Connection,Table,Columns | Export-Csv -Path c:\myNorthwindProductsData.csv -NoTypeInformation

You will notice that we piped the results from Select-Teradata 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.

The Connection, Table, and Columns are appended to the results in order to facilitate piping results from one of the CData Cmdlets directly into another one.

Deleting Data

The following line deletes any records that match the criteria:

Select-Teradata -Connection $conn -Table NorthwindProducts -Where "CategoryId = 5" | Remove-Teradata

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

Import-Csv -Path C:\MyNorthwindProductsUpdates.csv | %{
 $record = Select-Teradata -Connection $Teradata -Table NorthwindProducts -Where ("Id = `'"+$_.Id+"`'")
 if($record){
 Update-Teradata -Connection $teradata -Table NorthwindProducts -Columns ("ProductId","ProductName") -Values ($_.ProductId, $_.ProductName) -Where ("Id = `'"+$_.Id+"`'")
 }else{
 Add-Teradata -Connection $teradata -Table NorthwindProducts -Columns ("ProductId","ProductName") -Values ($_.ProductId, $_.ProductName)
 }
}

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!