Rem
Rem $Header: hr_cre.sql 29-aug-2002.11:44:03 hyeh Exp $
Rem
Rem hr_cre.sql
Rem
Rem Copyright (c) 2001, 2002, Oracle Corporation.  All rights reserved.  
Rem
Rem    NAME
Rem      hr_cre.sql - Create data objects for HR schema
Rem
Rem    DESCRIPTION
Rem      This script creates six tables, associated constraints
Rem      and indexes in the human resources (HR) schema.
Rem
Rem    NOTES
Rem
Rem    CREATED by Nancy Greenberg, Nagavalli Pataballa - 06/01/00
Rem
Rem    MODIFIED   (MM/DD/YY)
Rem    hyeh        08/29/02 - hyeh_mv_comschema_to_rdbms
Rem    ahunold     09/14/00 - Added emp_details_view
Rem    ahunold     02/20/01 - New header
Rem    vpatabal	 03/02/01 - Added regions table, modified regions
Rem			            column in countries table to NUMBER.
Rem			            Added foreign key from countries table
Rem			            to regions table on region_id.
Rem		                    Removed currency name, currency symbol 
Rem			            columns from the countries table.
Rem		      	            Removed dn columns from employees and
Rem			            departments tables.
Rem			            Added sequences.	
Rem			            Removed not null constraint from 
Rem 			            salary column of the employees table.

SET FEEDBACK 1
SET NUMWIDTH 10
SET LINESIZE 80
SET TRIMSPOOL ON
SET TAB OFF
SET PAGESIZE 100
SET ECHO OFF 

REM ********************************************************************
REM Create the REGIONS table to hold region information for locations
REM HR.LOCATIONS table has a foreign key to this table.

Prompt ******  Creating REGIONS table ....

CREATE TABLE regions
    ( region_id      NUMBER 
       CONSTRAINT  region_id_nn NOT NULL 
    , region_name    VARCHAR2(25) 
    );

CREATE UNIQUE INDEX reg_id_pk
ON regions (region_id);

ALTER TABLE regions
ADD ( CONSTRAINT reg_id_pk
       		 PRIMARY KEY (region_id)
    ) ;

REM ********************************************************************
REM Create the COUNTRIES table to hold country information for customers
REM and company locations. 
REM OE.CUSTOMERS table and HR.LOCATIONS have a foreign key to this table.

Prompt ******  Creating COUNTRIES table ....

CREATE TABLE countries 
    ( country_id      CHAR(2) 
       CONSTRAINT  country_id_nn NOT NULL 
    , country_name    VARCHAR2(40) 
    , region_id       NUMBER 
    , CONSTRAINT     country_c_id_pk 
        	     PRIMARY KEY (country_id) 
    ) 
    ORGANIZATION INDEX; 

ALTER TABLE countries
ADD ( CONSTRAINT countr_reg_fk
        	 FOREIGN KEY (region_id)
          	  REFERENCES regions(region_id) 
    ) ;

REM ********************************************************************
REM Create the LOCATIONS table to hold address information for company departments.
REM HR.DEPARTMENTS has a foreign key to this table.

Prompt ******  Creating LOCATIONS table ....

CREATE TABLE locations
    ( location_id    NUMBER(4)
    , street_address VARCHAR2(40)
    , postal_code    VARCHAR2(12)
    , city       VARCHAR2(30)
	CONSTRAINT     loc_city_nn  NOT NULL
    , state_province VARCHAR2(25)
    , country_id     CHAR(2)
    ) ;

CREATE UNIQUE INDEX loc_id_pk
ON locations (location_id) ;

ALTER TABLE locations
ADD ( CONSTRAINT loc_id_pk
       		 PRIMARY KEY (location_id)
    , CONSTRAINT loc_c_id_fk
       		 FOREIGN KEY (country_id)
        	  REFERENCES countries(country_id) 
    ) ;

Rem 	Useful for any subsequent addition of rows to locations table
Rem 	Starts with 3300

CREATE SEQUENCE locations_seq
 START WITH     3300
 INCREMENT BY   100
 MAXVALUE       9900
 NOCACHE
 NOCYCLE;

REM ********************************************************************
REM Create the DEPARTMENTS table to hold company department information.
REM HR.EMPLOYEES and HR.JOB_HISTORY have a foreign key to this table.

Prompt ******  Creating DEPARTMENTS table ....

CREATE TABLE departments
    ( department_id    NUMBER(4)
    , department_name  VARCHAR2(30)
	CONSTRAINT  dept_name_nn  NOT NULL
    , manager_id       NUMBER(6)
    , location_id      NUMBER(4)
    ) ;

CREATE UNIQUE INDEX dept_id_pk
ON departments (department_id) ;

ALTER TABLE departments
ADD ( CONSTRAINT dept_id_pk
       		 PRIMARY KEY (department_id)
    , CONSTRAINT dept_loc_fk
       		 FOREIGN KEY (location_id)
        	  REFERENCES locations (location_id)
     ) ;

Rem 	Useful for any subsequent addition of rows to departments table
Rem 	Starts with 280 

CREATE SEQUENCE departments_seq
 START WITH     280
 INCREMENT BY   10
 MAXVALUE       9990
 NOCACHE
 NOCYCLE;

REM ********************************************************************
REM Create the JOBS table to hold the different names of job roles within the company.
REM HR.EMPLOYEES has a foreign key to this table.

Prompt ******  Creating JOBS table ....

CREATE TABLE jobs
    ( job_id         VARCHAR2(10)
    , job_title      VARCHAR2(35)
	CONSTRAINT     job_title_nn  NOT NULL
    , min_salary     NUMBER(6)
    , max_salary     NUMBER(6)
    ) ;

CREATE UNIQUE INDEX job_id_pk 
ON jobs (job_id) ;

ALTER TABLE jobs
ADD ( CONSTRAINT job_id_pk
      		 PRIMARY KEY(job_id)
    ) ;

REM ********************************************************************
REM Create the EMPLOYEES table to hold the employee personnel 
REM information for the company.
REM HR.EMPLOYEES has a self referencing foreign key to this table.

Prompt ******  Creating EMPLOYEES table ....

CREATE TABLE employees
    ( employee_id    NUMBER(6)
    , first_name     VARCHAR2(20)
    , last_name      VARCHAR2(25)
	 CONSTRAINT     emp_last_name_nn  NOT NULL
    , email          VARCHAR2(25)
	CONSTRAINT     emp_email_nn  NOT NULL
    , phone_number   VARCHAR2(20)
    , hire_date      DATE
	CONSTRAINT     emp_hire_date_nn  NOT NULL
    , job_id         VARCHAR2(10)
	CONSTRAINT     emp_job_nn  NOT NULL
    , salary         NUMBER(8,2)
    , commission_pct NUMBER(2,2)
    , manager_id     NUMBER(6)
    , department_id  NUMBER(4)
    , CONSTRAINT     emp_salary_min
                     CHECK (salary > 0) 
    , CONSTRAINT     emp_email_uk
                     UNIQUE (email)
    ) ;

CREATE UNIQUE INDEX emp_emp_id_pk
ON employees (employee_id) ;


ALTER TABLE employees
ADD ( CONSTRAINT     emp_emp_id_pk
                     PRIMARY KEY (employee_id)
    , CONSTRAINT     emp_dept_fk
                     FOREIGN KEY (department_id)
                      REFERENCES departments
    , CONSTRAINT     emp_job_fk
                     FOREIGN KEY (job_id)
                      REFERENCES jobs (job_id)
    , CONSTRAINT     emp_manager_fk
                     FOREIGN KEY (manager_id)
                      REFERENCES employees
    ) ;

ALTER TABLE departments
ADD ( CONSTRAINT dept_mgr_fk
      		 FOREIGN KEY (manager_id)
      		  REFERENCES employees (employee_id)
    ) ;


Rem 	Useful for any subsequent addition of rows to employees table
Rem 	Starts with 207 


CREATE SEQUENCE employees_seq
 START WITH     207
 INCREMENT BY   1
 NOCACHE
 NOCYCLE;

REM ********************************************************************
REM Create the JOB_HISTORY table to hold the history of jobs that 
REM employees have held in the past.
REM HR.JOBS, HR_DEPARTMENTS, and HR.EMPLOYEES have a foreign key to this table.

Prompt ******  Creating JOB_HISTORY table ....

CREATE TABLE job_history
    ( employee_id   NUMBER(6)
	 CONSTRAINT    jhist_employee_nn  NOT NULL
    , start_date    DATE
	CONSTRAINT    jhist_start_date_nn  NOT NULL
    , end_date      DATE
	CONSTRAINT    jhist_end_date_nn  NOT NULL
    , job_id        VARCHAR2(10)
	CONSTRAINT    jhist_job_nn  NOT NULL
    , department_id NUMBER(4)
    , CONSTRAINT    jhist_date_interval
                    CHECK (end_date > start_date)
    ) ;

CREATE UNIQUE INDEX jhist_emp_id_st_date_pk 
ON job_history (employee_id, start_date) ;

ALTER TABLE job_history
ADD ( CONSTRAINT jhist_emp_id_st_date_pk
      PRIMARY KEY (employee_id, start_date)
    , CONSTRAINT     jhist_job_fk
                     FOREIGN KEY (job_id)
                     REFERENCES jobs
    , CONSTRAINT     jhist_emp_fk
                     FOREIGN KEY (employee_id)
                     REFERENCES employees
    , CONSTRAINT     jhist_dept_fk
                     FOREIGN KEY (department_id)
                     REFERENCES departments
    ) ;

REM ********************************************************************
REM Create the EMP_DETAILS_VIEW that joins the employees, jobs, 
REM departments, jobs, countries, and locations table to provide details
REM about employees.

Prompt ******  Creating EMP_DETAILS_VIEW view ...

CREATE OR REPLACE VIEW emp_details_view
  (employee_id,
   job_id,
   manager_id,
   department_id,
   location_id,
   country_id,
   first_name,
   last_name,
   salary,
   commission_pct,
   department_name,
   job_title,
   city,
   state_province,
   country_name,
   region_name)
AS SELECT
  e.employee_id, 
  e.job_id, 
  e.manager_id, 
  e.department_id,
  d.location_id,
  l.country_id,
  e.first_name,
  e.last_name,
  e.salary,
  e.commission_pct,
  d.department_name,
  j.job_title,
  l.city,
  l.state_province,
  c.country_name,
  r.region_name
FROM
  employees e,
  departments d,
  jobs j,
  locations l,
  countries c,
  regions r
WHERE e.department_id = d.department_id
  AND d.location_id = l.location_id
  AND l.country_id = c.country_id
  AND c.region_id = r.region_id
  AND j.job_id = e.job_id 
WITH READ ONLY;
