title: CHAR(5) vs. INT
body: <p>INFORMIX-SE 7.1:</p>
  
  <p>Assume that col5 CHAR(5) will only contain numbers from 00001 to 99999:</p>
  
  <ol>
  <li>a CHAR(5) column uses 5 bytes of storage, how many bytes does an INTEGER use?</li>
  <li>Does a UNIQUE INDEX on an INT column perform faster than a CHAR(5)?</li>
  <li>Is SELECT MAX() on an INT column faster than MAX() on the col5 CHAR(5)?</li>
  </ol>