title: Difference among explicit indexing and implicit indexing?
body: <p>I am learning Database and currently I am using mysql. While practicing it I got a doubt regarding the indexing and wanted to know what exactly is the difference between implicit and explicit indexing? Which is better? Considering that i will be using more of the update, insert and delete commands over the database, which is better suited that time and why?</p>
  
  <p>thank you</p>