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 Id, notebook_displayName INTO [csv://Notebooks.txt] FROM [Notebooks] WHERE Id = 'Jq74mCczmFXk1tC10GB'

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 Id, notebook_displayName INTO [csv://Notebooks.txt;delimiter=tab] FROM [Notebooks] WHERE Id = 'Jq74mCczmFXk1tC10GB'

C#

String connectionString = "OAuthClientId=MyApplicationId;OAuthClientSecret=MySecretKey;CallbackURL=http://localhost:33333;";

using (OneNoteConnection connection = new OneNoteConnection(connectionString)) {
  OneNoteCommand cmd = new OneNoteCommand("SELECT Id, notebook_displayName INTO [csv://Notebooks.txt] FROM [Notebooks] WHERE Id = 'Jq74mCczmFXk1tC10GB' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "OAuthClientId=MyApplicationId;OAuthClientSecret=MySecretKey;CallbackURL=http://localhost:33333;" 

Using connection As New OneNoteConnection(connectionString)
  Dim cmd As New OneNoteCommand("SELECT Id, notebook_displayName INTO [csv://Notebooks.txt] FROM [Notebooks] WHERE Id = 'Jq74mCczmFXk1tC10GB'", 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 = "OAuthClientId=MyApplicationId;OAuthClientSecret=MySecretKey;CallbackURL=http://localhost:33333;";

using (OneNoteConnection connection = new OneNoteConnection(connectionString)) {
  OneNoteCommand cmd = new OneNoteCommand("SELECT * INTO [Notebooks] IN [csv://filename=c:/Notebooks.csv;delimiter=tab] FROM [Notebooks] WHERE Id = 'Jq74mCczmFXk1tC10GB'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "OAuthClientId=MyApplicationId;OAuthClientSecret=MySecretKey;CallbackURL=http://localhost:33333;" 

Using connection As New OneNoteConnection(connectionString)
  Dim cmd As New OneNoteCommand("SELECT * INTO [Notebooks] IN [csv://filename=c:/Notebooks.csv;delimiter=tab] FROM [Notebooks] WHERE Id = 'Jq74mCczmFXk1tC10GB'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using