drop table test88_pks_person
/
drop table test88_pks_employee
/
drop table test88_pks_payroll
/
drop table test88_pks_project
/
drop table test88_pks_address
/
drop table test88_pks_category_contract
/
drop table test88_pks_contract
/
drop table test88_pks_category
/
drop table test88_nton_a
/
drop table test88_nton_b
/