title: comma separated result multiple columns sql server
body: <p>I have a table with values:</p>
  
  <pre><code>Key1     Key2     ColumnKey 
  ============================
  1        idx1      here
  2        idx2      there
  </code></pre>
  
  <p>I need to return, for more than one column result seperated by commas.</p>
  
  <p>Example: </p>
  
  <pre><code>1,2   idx1,idx2,      here,there
  </code></pre>