--
--  Drop any existing tables. Any errors are ignored.
--
drop table student cascade constraints;
drop table faculty cascade constraints;
drop table class cascade constraints;
drop table enrolled cascade constraints;
drop table emp cascade constraints;
drop table works cascade constraints;
drop table dept cascade constraints;
drop table flights cascade constraints;
drop table aircraft cascade constraints;
drop table certified cascade constraints;
drop table employees cascade constraints;
drop table suppliers cascade constraints;
drop table parts cascade constraints;
drop table catalog cascade constraints;
drop table sailors cascade constraints;
