title: Sequel::AdapterNotFound: LoadError: cannot load such file -- mysql
body: <p>When I am trying to migrate files using command prompt:
  <code>sequel -m db/migrations/ mysql://root:root@localhost/todo</code>
   I get the following error:</p>
  
  <blockquote>
    <p>Error: Sequel::AdapterNotFound: LoadError: cannot load such file --
    mysql
    C:/Ruby24-x64/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in
    `require'</p>
  </blockquote>
  
  <p>Below is my migration file in db/migrations: </p>
  
  <pre><code>    Sequel.migration do
       change do
          create_table :users do
          primary_key :id
          String :name, :unique =&gt; true, :length =&gt; 32, :null =&gt; false
          String :password, :length =&gt; 32, :null =&gt; false
          DateTime :created_at
       end
     end
  end 
  </code></pre>
  
  <p>My gemfile: </p>
  
  <pre><code>&gt;     GEM   remote: https://rubygems.org/   specs:
  &gt;     rack (2.0.3)
  &gt;     rack-protection (2.0.0)
  &gt;       rack
  &gt;     sinatra (2.0.0)
  &gt;       rack (~&gt; 1.4)
  &gt;       rack-protection (~&gt; 1.4)
  &gt;       tilt (~&gt; 1.3, &gt;= 1.3.4)
  &gt;     tilt (2.0.7)
  &gt; 
  &gt; PLATFORMS   x64-mingw32
  &gt; 
  &gt; DEPENDENCIES   bundler (= 1.15.1)   sinatra (= 2.0.0)
  &gt; 
  &gt; BUNDLED WITH
  &gt;    1.15.1
  </code></pre>