column|employee_id|not_nullable|number(6)
column|job_id|not_nullable|varchar2(10)
column|manager_id|nullable|number(6)
column|department_id|nullable|number(4)
column|location_id|nullable|number(4)
column|country_id|nullable|char(2)
column|first_name|nullable|varchar2(20)
column|last_name|not_nullable|varchar2(25)
column|salary|nullable|number(8,2)
column|commission_pct|nullable|number(2,2)
column|department_name|not_nullable|varchar2(30)
column|job_title|not_nullable|varchar2(35)
column|city|not_nullable|varchar2(30)
column|state_province|nullable|varchar2(25)
column|country_name|nullable|varchar2(40)
column|region_name|nullable|varchar2(25)