create table employees(employee_id char(5) PRIMARY KEY,first_name varchar2(10) NOT NULL,last_name varchar2(10) NOT NULL,email varchar2(30) NOT NULL,phone_number varchar2(15) NOT NULL,hire_date DATE NOT NULL,job_id varchar2(10) NOT NULL,salary varchar2(20) NOT NULL,commision_pct varchar2(20),manager_id char(8) NOT NULL,department_id char(8) NOT NULL);create table departments(department_id char(5) PRIMARY KEY,department_name varchar2(10) NOT NULL,manager_id char(5) NOT NULL,location_id char(5) NOT NULL);create table locations(location_id char(5) PRIMARY KEY,street_address varchar2(20) NOT NULL,postal_kode char(8) NOT NULL,city char(8) NOT NULL,state_province char (20) NOT NULL,country_id char(5) NOT NULL);create table countries(country_id char(5) PRIMARY KEY,country_name varchar2(20) NOT NULL,region_id char(5) NOT NULL);create table regions(region_id char(5) PRIMARY KEY,region_name varchar2(20) NOT NULL);create table job_history(employee_id char(5) PRIMARY KEY,start_date date NOT NULL,end_date date NOT NULL,job_id char(5) NOT NULL,departement_id char(5) NOT NULL);create table jobs(job_id char(5) PRIMARY KEY,job_title char(15) NOT NULL,min_salary char(10) NOT NULL,max_salary char(10) NOT NULL);