Time bracket for SYSDATE

Question

I need to select rows where timestamp is between now and 5 minutes in the past. How do I do it? Something like that:

select * from tableName where timestamp between sysdate and up to -5 min

The simpler - the better.

Answer 1

select *
  from tableName
 where timestamp between sysdate and sysdate - interval '5' minute

or old style:

select *
  from tableName
 where timestamp between sysdate and sysdate - 5 * 60 / 86400