title: Update table and add data in a Laravel 5 Migration
body: <p>I need to add a new column in my laravel Project, no problem for this, I used the <code>Schema::table()</code> to update and it's ok.
  Now I need to find out how many records I have on this table and update with some value.</p>
  
  <p>I have the table <code>Warrants</code>:</p>
  
  <pre><code>Schema::create('warrant_grants', function(Blueprint $table) {
      $table-&gt;increments('id');
      $table-&gt;integer('warrant_plan_id');
      $table-&gt;integer('shareholder_id');
  });
  </code></pre>
  
  <p>So I created the new field with a new migration file:</p>
  
  <pre><code>Schema::table('warrant_grants',function ($table) {
      $table-&gt;string('name',100);
  });
  </code></pre>
  
  <p>Now I need to update this field <code>name</code> in the table with some values, for example if the table has 100 records, then I need to insert in every row the value "Warrant-X" where X is a number starting with 1 to 100.
  For example:</p>
  
  <blockquote>
    <p>Warrant-1, Warrant-2, ....Warrant-100.</p>
  </blockquote>
  
  <p>I spent hours looking for some way to do this using Seeds but I didn't found. So basically i have two questions:</p>
  
  <ul>
  <li>Can I use Seeds in Laravel 5 to update values or I can just insert them?</li>
  <li>Can I create some SQL inside the Seeds (or migrations) to do this update for me?</li>
  </ul>