title: NULL NOT NULL on Default constraint in sql
body: <p>If I set a Record in Sql with a <code>Default</code> constraint like</p>
  
  <pre><code>[Publicbit]   BIT             DEFAULT ((0)),
  </code></pre>
  
  <p>Do I need to set the <code>NULL/NOTNULL</code> Constraint?</p>
  
  <p><strong>Edit:</strong> I am using a boolean but please expand your answer to other datatypes.</p>