title: Count duplicates in an internal table?
body: <p>I just want to ask on how to count duplicates in an internal table. I wanted to this in order for me to count per customer and put it into the Customer count column.</p>
  
  <pre><code>Sales Employee          Customer    Customer Count
  a                          1             2
  a                          2             2
  b                          3             3
  b                          2             3
  b                          4             3
  c                          1             1
  </code></pre>