Halting The Structure of The tables.txt

****************2018-Aug-28*****************
Create blank migration

rails g  migration AddcolumnLastnameToStudents Lastname:string

Add to def change line 
class AddColumnLastnameToStudents < ActiveRecord::Migration[5.2]
  def change
    add_column :students, :Lastname, :string
  end
end


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To reload the Database 

irb(main):006:0>reload!

To Update the Newely created Column i.e Lastname

irb(main):009:0> Student.find(1).update(Lastname:"Bhatta")