For example we might query the database for the amount of delta time in the records in the data base. It is possible to search for all records which have delta time equal to or greater than or less than a specified value.
The database could be queried for all recordings in which the delta time in the record is greater than 300 seconds, and the DBMS would list the records that meet this criterion. A similar query could be made for any waveform parameter stored in the database.