title: What does DF__role_sett__custo__4589517F in SQL Server database mean?
body: <p>I have just inherited a database from another developer, and I have looked through the <code>sys.objects</code> table, filtering by constraints. </p>
  
  <p>What does <code>DF__role_sett__custo__4589517F</code> mean - mainly the ID at the end of the string?</p>
  
  <p>I know that <code>DF_role_sett_custo</code> means default constraint of <code>role_setting_customer</code>, but am not sure of the last ID <code>4589517f</code>.  </p>