Migrations change the state of the database using the command

$ bundle exec rake db:migrate 

We can undo a single migration step using

 $ bundle exec rake db:rollback 

To go all the way back to the beginning, we can use

 $ bundle exec rake db:migrate VERSION=0 

As you might guess, substituting any other number for 0 migrates to that version number, where the version numbers come from listing the migrations sequentially

Migrations change the state of the database using the command

bundle exec rake db:migrate 

We can undo a single migration step using

bundle exec rake db:rollback 

To go all the way back to the beginning, we can use

bundle exec rake db:migrate VERSION=0 

As you might guess, substituting any other number for 0 migrates to that version number, where the version numbers come from listing the migrations sequentially.