title: how to get count of values in redis hash?
body: <p>i got a redis hash eg</p>
  
  <pre><code>key field value
  
  1000 state "ca" 
  1000 zip "95054"
  2000 state "ca" 
  2000 zip "95050"
  3000 state "ny" 
  3000 zip "12345"
  </code></pre>
  
  <p>how can i answer questions like how many state are "CA" . i need to do count of values for a field. is it possible ? help would be appreciated.</p>
  
  <p>-Avi</p>