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 HitCount, Title INTO [csv://ItemListing.txt] FROM [ItemListing] WHERE AdminEndedItemsOnly = 'true'

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 HitCount, Title INTO [csv://ItemListing.txt;delimiter=tab] FROM [ItemListing] WHERE AdminEndedItemsOnly = 'true'

C#

String connectionString = "DevID=MyDevID;OAuthClientId=MyAppID;OAuthClientSecret=MyCertID;RuName=MyRuName;SiteID=0;OAuthAccessToken=MyOAuthAccessToken";

using (EbayConnection connection = new EbayConnection(connectionString)) {
  EbayCommand cmd = new EbayCommand("SELECT HitCount, Title INTO [csv://ItemListing.txt] FROM [ItemListing] WHERE AdminEndedItemsOnly = 'true' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "DevID=MyDevID;OAuthClientId=MyAppID;OAuthClientSecret=MyCertID;RuName=MyRuName;SiteID=0;OAuthAccessToken=MyOAuthAccessToken" 

Using connection As New EbayConnection(connectionString)
  Dim cmd As New EbayCommand("SELECT HitCount, Title INTO [csv://ItemListing.txt] FROM [ItemListing] WHERE AdminEndedItemsOnly = 'true'", 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 = "DevID=MyDevID;OAuthClientId=MyAppID;OAuthClientSecret=MyCertID;RuName=MyRuName;SiteID=0;OAuthAccessToken=MyOAuthAccessToken";

using (EbayConnection connection = new EbayConnection(connectionString)) {
  EbayCommand cmd = new EbayCommand("SELECT * INTO [ItemListing] IN [csv://filename=c:/ItemListing.csv;delimiter=tab] FROM [ItemListing] WHERE AdminEndedItemsOnly = 'true'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "DevID=MyDevID;OAuthClientId=MyAppID;OAuthClientSecret=MyCertID;RuName=MyRuName;SiteID=0;OAuthAccessToken=MyOAuthAccessToken" 

Using connection As New EbayConnection(connectionString)
  Dim cmd As New EbayCommand("SELECT * INTO [ItemListing] IN [csv://filename=c:/ItemListing.csv;delimiter=tab] FROM [ItemListing] WHERE AdminEndedItemsOnly = 'true'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using