title: MySQL cartesian product between two SELECT statements
body: <p>I want to perform a cartesian product between two SELECT statements as</p>
  
  <pre><code>SELECT 1, 2     INNER JOIN     SELECT 3, 4 ;
  </code></pre>
  
  <p>I expect the result to be every combination of (1,2) with (3,4), like:</p>
  
  <pre><code>1  3
  2  3
  1  4
  2  4
  </code></pre>