Postgres Plus Advanced Server Oracle Compatibility Developer's Guide :
DROP TABLE -- remove a table
DROP TABLE name
DROP TABLE removes tables from the database. Only its owner may destroy a table. To empty a table of rows, without destroying the table, use DELETE.
DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table.
The name (optionally schema-qualified) of the table to drop.
To destroy table, emp:
DROP TABLE emp;