Deleting large number of objects

Hi.

I have a lot of objects that need to be deleted. More than 30, can this be done directly in the database and if so, which tables?
The problem with doing it in the app is that it takes so long to delete one object. 1-2 minutes each at least.

Please advise.
 

Please see bellowuse OBJECTS_TREE table to figure out which OBJECT_ID  to delete

Than use this script to delete them

delete from OBJECTS_TREE where OBJECT_ID=
delete from OBJECTS where OBJECT_ID=
delete from OBJECTS_HISTORY where OBJECT_ID=
delete from CONNECTIONS where OBJECT_ID=
delete from SCHEDULE where OBJECT_ID=Please make a backup first.