title: SQL Oracle error: ORA-00904
body: <p>I am creating a table and I typed this command:</p>
  
  <pre><code>SQL&gt; create table accident(report_number integer primary key,
    2  date varchar(20),
    3  location varchar(20));
  </code></pre>
  
  <p>I got this error:</p>
  
  <pre><code>date varchar(20),
  *
  ERROR at line 2:
  ORA-00904: : invalid identifier
  </code></pre>
  
  <p>Can anyone tell me where the error is and how to rectify it?</p>