title: Remove column from postgresql via rails
body: <p>I use this command to create an avatar column in my postgresql database.</p>
  
  <pre><code>rails g migration add_avatar_to_users avatar:string
  rake db:migrate
  </code></pre>
  
  <p>I have an <code>image</code> column i would like to get rid of in the same database. I don't know the command to do so. I dont need the data and that column anymore.</p>
  
  <p>I tried </p>
  
  <pre><code>rails destroy migration add_image_to_users image:string
  rake db:migrate
  </code></pre>
  
  <p>But it did not fix the problem =/</p>