title: Primary Key in SQL - Default value
body: <p>I am working from this database, its one of the first I have tried building:</p>
  
  <p><a href="http://sqlfiddle.com/#!2/38ef8" rel="nofollow">http://sqlfiddle.com/#!2/38ef8</a></p>
  
  <p>When I try to add this line:</p>
  
  <pre><code>Insert Into country (name) values ('US');
  </code></pre>
  
  <p>It says Field 'id' doesn't have a default value. Am I doing my primary key correctly? I have seen people using "auto_incrment" on their primary key like this example:</p>
  
  <p><a href="http://sqlfiddle.com/#!2/c807a/2" rel="nofollow">http://sqlfiddle.com/#!2/c807a/2</a></p>
  
  <p>Is that what I should be using?</p>