title: Stop allowing null in a table column
body: <p>I have a table in SQL server 2008.
  I need a column that until now wasn't necessary, not to allow <code>NULL</code> anymore, without droping the table.
  I tried to do something like this:</p>
  
  <pre><code>ALTER TABLE [Sessions] ALTER COLUMN region_id NOT NULL;
  </code></pre>
  
  <p><strong>EDIT:</strong> It was a small syntax error. solved.</p>