<drop class statement>
| <drop trigger statement>
| <drop deferred trigger statement>
| <drop serial statement>
| <drop index statement>
| <drop variable statement>
DROP [ <class type> ] <class specification comma list>
DROP TRIGGER <trigger name comma list>
DROP DEFERRED TRIGGER <trigger spec>
DROP SERIAL <serial name>
DROP [REVERSE] [UNIQUE] INDEX [index name] ON <class name>
| ( <attribute name> )
DROP VARIABLE <variable comma list>
<trigger name comma list>
| ALL TRIGGERS
<class hierarchy>
| ( <class hierarchy comma list> )
[ONLY] <class name>
|ALL <class name> [EXCEPT <class specification> ]
DROP person, employee;
DROP INDEX ON employee (name);
DROP INDEX ON employee (ssn, name);
DROP TRIGGER check_salary;
DROP DEFERRED TRIGGER check_salary, check_age;
DROP DEFERRED TRIGGER ALL TRIGGERS;