title: IN vs OR of Oracle, which faster?
body: <p>I'm developing an application which processes many data in Oracle database.<br>
  In some case, I have to get many object based on a given list of conditions, and I use <code>SELECT ...FROM.. WHERE... IN...</code>, but the <code>IN</code> expression just accepts a list whose size is maximum 1,000 items.  </p>
  
  <p>So I use <code>OR</code> expression instead, but as I observe -- perhaps this query (using <code>OR</code>) is slower than <code>IN</code> (with the same list of condition). Is it right? And if so, how to improve the speed of query?  </p>