delete test data from postgre sql

As i am programming and testing, i have filled up the PostgreSQL database of FRED with testdata. Now i would like the delete all the data, which means all domains, contacts, nssets etc. Is there some fast way to do this ? or do i have to empty every table, one at a time ? and would that solution be secure ? regards Petur ________________________________________ Fra: fred-users-bounces(a)lists.nic.cz [fred-users-bounces(a)lists.nic.cz] På vegne af Jaromír Talíř [jaromir.talir(a)nic.cz] Sendt: 28. november 2008 17:31 Til: fred-users(a)lists.nic.cz Emne: Re: contact ID This Fred feature is called "handle protection". We decided to prevent handle from it's immediate registration to protect contacts. Imagine situation when some domain is registered for contact C123 and this person will switch to use different contact handle for it's domain and delete old unused contact C123. Someone can register C123 and claim to registrar that he is original owner of domain. We think registrar need some time for example to do update of its own contact database. After some time (2 month) this contact is not protected anymore and anybody can register it. Jaromir Petur Kirke píše v Po 24. 11. 2008 v 15:57 +0000: This email and its attachments may be confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient or authorized to receive information for the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If the email contains proposals, they are valid for 30 days following the date of email transmission. Finally, the recipient should check this email and any attachment for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by email.