title: Is there a default value, Unix timestamp, for column in PostgreSQL?
body: <p>I don't know why, but I like to work with Unix-timestamp. Maybe because I need to perform calculations with time like with number, e.g. time()-604800.</p>
  
  <p>Right now I have integer column whereto I insert result of time(). I think it isn't right way, is it? Is there a default value -- unix timestamp?</p>