title: Update values in identity column
body: <p>How do I override the <code>identity</code> column in MSSQL? I tried :</p>
  
  <pre><code>    SET IDENTITY_INSERT GeoCountry ON
      UPDATE GeoCountry SET CountryID = 18 WHERE CountryID = 250
  </code></pre>
  
  <p>But I get back a </p>
  
  <blockquote>
    <p>Line 2: Cannot update identity column 'CountryID'.</p>
  </blockquote>