HR.DEPARTMENTS (table)

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Table HR.DEPARTMENTS
Description Departments table that shows details of departments where employees

work. Contains 27 rows; references with locations, employees, and job_history tables.

Columns

Column Data Type Nullable Default Description
DEPARTMENT_ID NUMBER(4, 0) not null Primary key column of departments table.
DEPARTMENT_NAME VARCHAR2(30) not null A not null column that shows name of a department. Administration,

Marketing, Purchasing, Human Resources, Shipping, IT, Executive, Public Relations, Sales, Finance, and Accounting.

MANAGER_ID NUMBER(6, 0) null Manager_id of a department. Foreign key to employee_id column of employees table. The manager_id column of the employee table references this column.
LOCATION_ID NUMBER(4, 0) null Location id where a department is located. Foreign key to location_id column of locations table.

Primary Key

Primary Key Columns
DEPT_ID_PK DEPARTMENT_ID

Indexes

Index Type Columns
DEPT_LOCATION_IX LOCATION_ID

Check Constraints

Check Constraint Expression Description
DEPT_NAME_NN "DEPARTMENT_NAME" IS NOT NULL

Foreign Keys

Relation Column Referenced Column
HR.LOCATIONS LOCATION_ID LOCATION_ID
HR.EMPLOYEES MANAGER_ID EMPLOYEE_ID

Detail Tables

Detail Table Column Referencing Column
HR.EMPLOYEES DEPARTMENT_ID DEPARTMENT_ID
HR.JOB_HISTORY DEPARTMENT_ID DEPARTMENT_ID