tyle="border: 1px solid #aaa; padding: 5px;"> <a href="HlenCommand.html">HLEN</a>  </td><td style="border: 1px solid #aaa; padding: 5px;"> <i>key</i> </td><td style="border: 1px solid #aaa; padding: 5px;">   Return the number of items in a hash.  </td></tr><tr><td style="border: 1px solid #aaa; padding: 5px;"> <a href="HgetallCommand.html">HKEYS</a>  </td><td style="border: 1px solid #aaa; padding: 5px;"> <i>key</i> </td><td style="border: 1px solid #aaa; padding: 5px;">  Return all the fields in a hash.  <