You can use the SELECT INTO statement to export formatted data to a file.

Data Export with an SQL Query

The following query exports data into a file formatted in comma-separated values (CSV):

SELECT Snippet_Title, ContentDetails_ItemType INTO [csv://Groups.txt] FROM [Groups] WHERE Id = 'S'

You can specify other formats in the file URI. The possible delimiters are tab, semicolon, and comma with the default being a comma. The following example exports tab-separated values:

SELECT Snippet_Title, ContentDetails_ItemType INTO [csv://Groups.txt;delimiter=tab] FROM [Groups] WHERE Id = 'S'

C#

String connectionString = "InitiateOAuth=GETANDREFRESH;ContentOwnerId=MyContentOwnerId;ChannelId=ChannelId;";

using (YouTubeAnalyticsConnection connection = new YouTubeAnalyticsConnection(connectionString)) {
  YouTubeAnalyticsCommand cmd = new YouTubeAnalyticsCommand("SELECT Snippet_Title, ContentDetails_ItemType INTO [csv://Groups.txt] FROM [Groups] WHERE Id = 'S' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;ContentOwnerId=MyContentOwnerId;ChannelId=ChannelId;" 

Using connection As New YouTubeAnalyticsConnection(connectionString)
  Dim cmd As New YouTubeAnalyticsCommand("SELECT Snippet_Title, ContentDetails_ItemType INTO [csv://Groups.txt] FROM [Groups] WHERE Id = 'S'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using

You can specify other file formats in the URI. The following example exports tab-separated values:

C#

String connectionString = "InitiateOAuth=GETANDREFRESH;ContentOwnerId=MyContentOwnerId;ChannelId=ChannelId;";

using (YouTubeAnalyticsConnection connection = new YouTubeAnalyticsConnection(connectionString)) {
  YouTubeAnalyticsCommand cmd = new YouTubeAnalyticsCommand("SELECT * INTO [Groups] IN [csv://filename=c:/Groups.csv;delimiter=tab] FROM [Groups] WHERE Id = 'S'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;ContentOwnerId=MyContentOwnerId;ChannelId=ChannelId;" 

Using connection As New YouTubeAnalyticsConnection(connectionString)
  Dim cmd As New YouTubeAnalyticsCommand("SELECT * INTO [Groups] IN [csv://filename=c:/Groups.csv;delimiter=tab] FROM [Groups] WHERE Id = 'S'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using