title: how do I get a list of columns in a sql table that are not in another table?
body: <p>table A has 125 columns. table B has 123 columns.</p>
  <pre><code>select * from (desc A full outer join desc B on A.col_name = B.col_name) 
  </code></pre>
  <p>the result of this should have null corresponding to missing columns.</p>
  <p>why doesn't this work and throw the error <code>mismatched input 'from' expecting &lt;EOF&gt;</code></p>