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, Status INTO [csv://Subscriber.txt] FROM [Subscriber] WHERE EmailAddress = 'john.doe@example.com'

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, Status INTO [csv://Subscriber.txt;delimiter=tab] FROM [Subscriber] WHERE EmailAddress = 'john.doe@example.com'

C#

String connectionString = "User=myUser;Password=myPassword;";

using (SFMarketingCloudConnection connection = new SFMarketingCloudConnection(connectionString)) {
  SFMarketingCloudCommand cmd = new SFMarketingCloudCommand("SELECT Id, Status INTO [csv://Subscriber.txt] FROM [Subscriber] WHERE EmailAddress = 'john.doe@example.com' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "User=myUser;Password=myPassword;" 

Using connection As New SFMarketingCloudConnection(connectionString)
  Dim cmd As New SFMarketingCloudCommand("SELECT Id, Status INTO [csv://Subscriber.txt] FROM [Subscriber] WHERE EmailAddress = 'john.doe@example.com'", 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 = "User=myUser;Password=myPassword;";

using (SFMarketingCloudConnection connection = new SFMarketingCloudConnection(connectionString)) {
  SFMarketingCloudCommand cmd = new SFMarketingCloudCommand("SELECT * INTO [Subscriber] IN [csv://filename=c:/Subscriber.csv;delimiter=tab] FROM [Subscriber] WHERE EmailAddress = 'john.doe@example.com'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "User=myUser;Password=myPassword;" 

Using connection As New SFMarketingCloudConnection(connectionString)
  Dim cmd As New SFMarketingCloudCommand("SELECT * INTO [Subscriber] IN [csv://filename=c:/Subscriber.csv;delimiter=tab] FROM [Subscriber] WHERE EmailAddress = 'john.doe@example.com'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using