title: Multiple Full Outer Joins
body: <p>I want to use the result of a <code>FULL OUTER JOIN</code> as a table to <code>FULL OUTER JOIN</code> on another table. What is the syntax that I should be using?  </p>
  
  <p>For eg: T1, T2, T3 are my tables with columns id, name. I need something like:   </p>
  
  <pre class="lang-sql prettyprint-override"><code>T1 FULL OUTER JOIN T2 on T1.id = T2.id   ==&gt; Let this be named X
  
  X FULL OUTER JOIN T3 on X.id = t3.id  
  </code></pre>
  
  <p>I want this to be achieved so that in the final ON clause, I want the T3.id to match either <code>T1.id</code> or <code>T2.id</code>. Any alternative way to do this is also OK. </p>