Document the lists method.

queries.md

@@ -39,6 +39,14 @@ The database query builder provides a convenient, fluent interface to creating a
 
  $name = DB::table('users')->where('name', 'John')->pluck('name');
 
+**Retrieving A List Of Column Values**
+
+ $roles = DB::table('roles')->lists('title');
+
+This method will return an array of role titles, keyed by the role ID. You may also specify a custom key:
+
+ $roles = DB::table('roles')->lists('title', 'name');
+
 **Specifying A Select Clause**
 
  $users = DB::table('users')->select('name', 'email')->get();