title: How to remove unique key from mysql table
body: <p>I need to remove a unique key from my mysql table. How can remove that using mysql query.</p>
  
  <p>I tried this but it is not working</p>
  
  <pre><code>alter table tbl_quiz_attempt_master drop unique key;
  </code></pre>
  
  <p>Please help me</p>
  
  <p>Thanks</p>