drop table employees;
drop table departments;
drop table locations;
drop table countries;
drop table regions;
drop table jobs;
drop table job_history;

create or replace synonym employees for hr.employees;
create or replace synonym departments for hr.departments;
create or replace synonym locations for hr.locations;
create or replace synonym countries for hr.countries;
create or replace synonym regions for hr.regions;
create or replace synonym jobs for hr.jobs;
create or replace synonym job_history for hr.job_history;