title: Selecting rows where value don't exist in other table
body: <p>I've got two tables. One for main accounts and one for banned accounts and I wanna select all the members in the main accounts and only those who is not banned.</p>
  
  <pre><code>SELECT Username, $field AS Output
  FROM `Player_Accounts`, `Ban_List`
  WHERE Ban_List.Banned_Name != Username
  ORDER BY $field DESC LIMIT 0, 25;
  </code></pre>
  
  <p>The query take over 1,30min to execute and display the results</p>