Ingeniería de software inversa. BD HR

Regions:

Region_ID

Countries:

Country_ID

Region_ID

Locations:

Country_ID

Location_ID

Departments:

Department_ID

Location_ID

Jobs:

Job_id

1:N

1:N

1:N

Employees:

Departament_ID

Employee_ID

Job_ID

Job_history:

Employee_ID

Job_ID

Department_ID

1:N

1:1

1:1

N:1