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, Location INTO [csv://Calendar.txt] FROM [Calendar] WHERE Location = 'Chapel Hill'

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, Location INTO [csv://Calendar.txt;delimiter=tab] FROM [Calendar] WHERE Location = 'Chapel Hill'

C#

String connectionString = "User=MyUserAccount;Password=MyPassword;Auth Scheme=NTLM;URL=http://sharepointserver/mysite;";

using (SharePointConnection connection = new SharePointConnection(connectionString)) {
  SharePointCommand cmd = new SharePointCommand("SELECT Id, Location INTO [csv://Calendar.txt] FROM [Calendar] WHERE Location = 'Chapel Hill' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "User=MyUserAccount;Password=MyPassword;Auth Scheme=NTLM;URL=http://sharepointserver/mysite;" 

Using connection As New SharePointConnection(connectionString)
  Dim cmd As New SharePointCommand("SELECT Id, Location INTO [csv://Calendar.txt] FROM [Calendar] WHERE Location = 'Chapel Hill'", 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=MyUserAccount;Password=MyPassword;Auth Scheme=NTLM;URL=http://sharepointserver/mysite;";

using (SharePointConnection connection = new SharePointConnection(connectionString)) {
  SharePointCommand cmd = new SharePointCommand("SELECT * INTO [Calendar] IN [csv://filename=c:/Calendar.csv;delimiter=tab] FROM [Calendar] WHERE Location <> 'Chapel Hill'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "User=MyUserAccount;Password=MyPassword;Auth Scheme=NTLM;URL=http://sharepointserver/mysite;" 

Using connection As New SharePointConnection(connectionString)
  Dim cmd As New SharePointCommand("SELECT * INTO [Calendar] IN [csv://filename=c:/Calendar.csv;delimiter=tab] FROM [Calendar] WHERE Location <> 'Chapel Hill'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using