title: Show all records/some records based on parameter value
body: <p>I have stored procedure which returns around 100 rows. One column is Category. </p>
  
  <p>In SSRS, I've created DataSet related to that stored procedure. On Report body I have Tablix, which I relate to DataSet.</p>
  
  <p>Now, I have additional parameter, called FilterColumn, which consist all different categories from dataset, plus one row called "All products". </p>
  
  <p>How to filter tablix based on that parameter to show me whether products from specific categories or all products?</p>