title: How to execute new insert/update trigger on existing rows in SQL Server?
body: <p>I have added a insert/update trigger to a table that already has some rows.
  What is the cleanest way to execute the new insert/update trigger on the existing rows?</p>
  
  <p>(Dirty idea is to modify some column and revert it in a transaction. Or add temporarily a column a change its data.)</p>