title: How to get list of values in GROUP_BY clause?
body: <p>If I have data like this in a table</p>
  
  <pre><code>id   data
  --   ----
  1    1
  1    2
  1    3
  2    4
  2    5
  3    6
  3    4
  </code></pre>
  
  <p>How do I get results like this in a query (on sybase server)?</p>
  
  <pre><code>id   data
  --   ----
  1    1, 2, 3
  2    4, 5
  3    6, 4
  </code></pre>