Migrations are Ruby classes that allow you to evolve your database schema over time in a consistent way. They provide:

• Version control for database schema
• Team collaboration on schema changes
• Database-agnostic schema modifications
• Rollback capabilities

class CreateUsers < ActiveRecord::Migration[7.0]
  def change
    create_table :users do |t|
      t.string :email
      t.timestamps
    end
  end
end