Sometimes I need to build a small script to delete a huge set of tables of a schema.
In Oracle is easy to do it, using the meta tables "all_tables", "all_views", and "all_sequences":
select 'drop table ' || table_name || ' cascade constraints;'
from all_tables where owner='protoss' and table_name not like 'BIN%';
select 'drop view ' || view_name || ' ;'
from all_views where owner='zerg' ;
select 'drop sequence ' || sequence_name || ' ;'
from all_sequences where sequence_owner='spacemarine' ;
The "BIN%" table are special temp tables of oracle.
On PostgreSQL, try use PG_TABLES meta-table