Ruby On Railsでデータベースカラムの追加と削除を行う　

rails g migration Addカラム名Toテーブル名 カラム名:型名

rails g migration AddStatusToArticles  status:integer

class AddDetailsToArticles < ActiveRecord::Migration
  def change
    add_column :articles, :status, :integer
  end
end

bundle exec rake db:migrate

rails g migration Removeカラム名Fromテーブル名 カラム名:型名

rails g migration RemoveStatusFromArticles  status:integer

class RemoveStatusFromArticle < ActiveRecord::Migration
  def change
    remove_column :articles, :status, :integer
  end
end

bundle exec rake db:migrate