[1.2.X] Fixed #14185 - improved example SQL for 'select' example.

  
Thanks to Trindaz for the suggestion.
  
Also fixed some references to 'lede' which is no longer part of the
example Blog model.

Backport of [13652] from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13653 bcc190cf-cafb-0310-a4f2-bffc1f526a37