title: Is normal MySql index required when we have Composite index
body: <p>We have MySql table having 25 million rows</p>
  
  <p>Following are the columns in table</p>
  
  <pre><code>c_id,c_name,s_id,l_type,l_time,message,domain
  </code></pre>
  
  <p>among above we have normal indexes on c_id,c_name,s_id,l_type,domain columns</p>
  
  <p>I'm planning to add composite index on domain, l_time, l_type columns. So now can I remove individual index on domain?</p>
  
  <p>Thanks</p>