for eg when one does online shopping electronic invoice is provided with the ordernumber or the transaction number.
to really understand whether the data has been inserted or updated in the database one has to query the database with sql statements to validate the data.
if the response time for the page to get loaded takes too long than specified..then one of the reasons may be lack of indexing in the database....


again test scenarios for data base testing shd be based on specification /requiremnts.