title: Creating an entity diagram of a database without any foreign keys
body: <p>I need to create an entity diagram of a MSSQL 2005 database.</p>
  
  <p>Relationships are defined by using primary keys consistently, but there are no foreign keys anywhere. I tried Microsoft Visio's "Reverse Engineer" function, which of course failed due to the lack of foreign keys.</p>
  
  <p>Therefore, I need a diagram tool which doesn't solely rely on foreign keys when drawing relationships.</p>