title: Use WHERE clause in Redis to query value
body: <p>I am learning redis and I have a beginner question. I know that redis is all about keys! Is there any way to query/parse the value of a key for something specific?</p>
  
  <p>Lets say I have keys and some json as values.
  e.g.</p>
  
  <pre><code>key1 = {"id":"1", "colour":"red}
  key2 = {"id":"2", "colour":"green}
  key3 = {"id":"3", "colour":"red}
  </code></pre>
  
  <p>How do I query for all "values (jsons) that have the colour=red? </p>
  
  <pre><code>select all values WHERE colour==red
  </code></pre>