title: DELTE Redis key with Pattern
body: <p>I am using Redis hash set to store data in the following format:</p>
  <pre><code>hset b1.b2.b3 name test
  </code></pre>
  <p>Now I want to delete this key so I am using the following format:</p>
  <pre><code>del b1.b2.*
  </code></pre>
  <p>But it not working so How I delete the Redis key using a pattern?</p>