title: Best way to check whether a row has been updated in SQL
body: <p>I have an update statement which updates a table. And there is a column that records the last modified time. If data in a specific row has not been changed, I don't want to change the last modified date time.</p>
  
  <p>What is the best way to check whether an update statement will change the row of data or not.</p>
  
  <p>Thanks,</p>