title: rails db:migrate vs rake db:migrate
body: <p>I'm new to rails. I noticed when generating data migration in rails 5, some people use <code>rails db:migrate</code> over <code>rake db:migrate</code>. Can someone explain the difference between the rails vs rake command in database migration? Does it mean rake command is obsolete in rails 5?</p>
  
  <p>many thanks</p>