title: Count the number of elements in a comma separated string in Oracle
body: <p>Say I have a table where <code>Col2</code> is varchar</p>
  
  <pre><code>Col1 Col2
  1    001,002
  2    003,004,005
  </code></pre>
  
  <p>I need to count the number of elements in Col2,and return it, if I do:</p>
  
  <pre><code>select --do something here with column-- from table
  </code></pre>
  
  <p>it'll give me:</p>
  
  <pre><code>2
  3 
  </code></pre>