title: Avoid nested regexp_replace( ) for changing multiple char(s) in a string
body: <p>I want to replace multiple char(s) in a string using a simple query for Oracle 11g. Now I use:</p>
  
  <pre><code>select regexp_replace(regexp_replace(regexp_replace(colName, 'a', 'x'), 'b', 'y' ) 'c', 'z') from myTable;
  </code></pre>
  
  <p>but I'm not very happy with it. What would be a more intuitive query that has the same output?</p>