title: update Timestamp Cell in Sqlite
body: <p>I have An Sqlite Database and I have an extra cell in it with a Timestamp item. The timestamp should display the last operation done with the row.
  (Z.B. has been updated) so everytime The row changes I want the timestamp to become the current timestamp. Especially when I query the row. 
  In general I would now create a timestamp object and then update my row with the new timestamp. </p>
  
  <p>But since this seems like a common operation which I think a lot of people have done I wonder If there is an other solution to register the last call of an object in a database. How would you do that?</p>