PowerShell で Data データをCSV に落としてみた

標準PowerShell cmdlets を使って テーブルにアクセス。

CData Cmdlets Module for は、直感的な データ連携を提供する標準cmdlet です。 本記事では、GoogleApps Cmdlets を使ったサンプルを提供します。

Creating a Connection to Your Data

Google uses the OAuth authentication standard. To access Google APIs on behalf on individual users, you can use the embedded credentials or you can register your own OAuth app.

OAuth also enables you to use a service account to connect on behalf of users in a Google Apps domain. To authenticate with a service account, you will need to register an application to obtain the OAuth JWT values.

In addition to the OAuth values, to access Google data you will need the Email of the Google account. See the "Getting Started" chapter in the help documentation for a guide to using OAuth.

$conn = Connect-GoogleApps  -OAuthClientId "$OAuthClientId" -OAuthClientSecret "$OAuthClientSecret" -CallbackURL "$CallbackURL" -Email "$Email"

Selecting Data

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

Select-GoogleApps -Connection $conn -Table GDrive | Select -Property * -ExcludeProperty Connection,Table,Columns | Export-Csv -Path c:\myGDriveData.csv -NoTypeInformation

You will notice that we piped the results from Select-GoogleApps 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-GoogleApps -Connection $conn -Table GDrive -Where "Formats = DOC" | Remove-GoogleApps

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

Import-Csv -Path C:\MyGDriveUpdates.csv | %{
  $record = Select-GoogleApps -Connection $GoogleApps -Table GDrive -Where ("Id = `'"+$_.Id+"`'")
  if($record){
    Update-GoogleApps -Connection $googleapps -Table GDrive -Columns ("Title","Size") -Values ($_.Title, $_.Size) -Where ("Id = `'"+$_.Id+"`'")
  }else{
    Add-GoogleApps -Connection $googleapps -Table GDrive -Columns ("Title","Size") -Values ($_.Title, $_.Size)
  }
}

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!

 
 
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