title: How to update email in database using sql update?
body: <p>In my database I have personal email field where Its containing users email. I just want to update all the user email into my test email.</p>
  
  <p><strong>Personal Email</strong></p>
  
  <p>ex.</p>
  
  <p><code>john@gmail.com</code> >> <code>test1@test.com</code><br>
  <code>alves@gmail.com</code> >> <code>test2@test.com</code></p>
  
  <p>Note that I have more than 40,000 records so I want to update personal email field which not equal to null using sql update query</p>