title: Multiple Patterns in Regex
body: <p>Can there be multiple patterns in Regexp_Replace.</p>
  
  <p>Pattern 1 :  <code>'^#.*'</code></p>
  
  <p>Pattern 2:  <code>'^//.*'</code></p>
  
  <p>Pattern 3 : <code>'^&amp;&amp;.*'</code></p>
  
  <p>I want all three patterns in same regexp_replace function like</p>
  
  <pre><code>select REGEXP_REPLACE ('Unit testing last level','Pattern 1,Pattern 2,Pattern 3','',1,0,'m') 
    from dual;
  </code></pre>