title: KDB Query for OR operator
body: <p>What is the equivalent query in KDB Web:</p>
  
  <pre><code>SELECT * FROM TABLE
  WHERE (COLA = 'A' AND COLB = 'B') OR (COLA = 'C' AND COLB = 'D')
  
  http://kdbserver:5001/?select fro table where _____________________
  </code></pre>
  
  <p>N.B.: cola and colb are having string datatype</p>