title: sort numerically not alphabetically using displaytag
body: <p>I am using displaytag,While sorting the data I am getting output like
  1
  10
  100
  2
  3
  instead of numerical sort. I change the datatype to number. so while doing orderby query in
  database ,it sorted correctly ,but when I click on row_number column for resort it gives 
  aphabetically sort Not numerical . Please help</p>