title: MySQL: Looping Through Multiple Fields in an IN Clause
body: <p>I have a universe that has one column where there are 3 types of id's. I know that I can use 3 separate OR clauses in my WHERE statement </p>
  
  <pre><code>WHERE isin IN(n) 
  OR cusip IN(n) 
  OR psedol IN(n)
  </code></pre>
  
  <p>but is there a more efficient way to do this?</p>