[ADD] Employees DB

Author: stivenramireza

resources/07-employee-structure.sql

@@ -0,0 +1,60 @@
+CREATE TABLE regions (
+	region_id INT PRIMARY KEY,
+	region_name VARCHAR (25) DEFAULT NULL
+);
+
+CREATE TABLE countries (
+	country_id CHAR (2) PRIMARY KEY,
+	country_name VARCHAR (40) DEFAULT NULL,
+	region_id INT NOT NULL,
+	FOREIGN KEY (region_id) REFERENCES regions (region_id) ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE TABLE locations (
+	location_id INT PRIMARY KEY,
+	street_address VARCHAR (40) DEFAULT NULL,
+	postal_code VARCHAR (12) DEFAULT NULL,
+	city VARCHAR (30) NOT NULL,
+	state_province VARCHAR (25) DEFAULT NULL,
+	country_id CHAR (2) NOT NULL,
+	FOREIGN KEY (country_id) REFERENCES countries (country_id) ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE TABLE jobs (
+	job_id INT PRIMARY KEY,
+	job_title VARCHAR (35) NOT NULL,
+	min_salary DECIMAL (8, 2) DEFAULT NULL,
+	max_salary DECIMAL (8, 2) DEFAULT NULL
+);
+
+CREATE TABLE departments (
+	department_id INT PRIMARY KEY,
+	department_name VARCHAR (30) NOT NULL,
+	location_id INT DEFAULT NULL,
+	FOREIGN KEY (location_id) REFERENCES locations (location_id) ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+CREATE TABLE employees (
+	employee_id INT PRIMARY KEY,
+	first_name VARCHAR (20) DEFAULT NULL,
+	last_name VARCHAR (25) NOT NULL,
+	email VARCHAR (100) NOT NULL,
+	phone_number VARCHAR (20) DEFAULT NULL,
+	hire_date DATE NOT NULL,
+	job_id INT NOT NULL,
+	salary DECIMAL (8, 2) NOT NULL,
+	manager_id INT DEFAULT NULL,
+	department_id INT DEFAULT NULL,
+	FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON DELETE CASCADE ON UPDATE CASCADE,
+	FOREIGN KEY (department_id) REFERENCES departments (department_id) ON DELETE CASCADE ON UPDATE CASCADE,
+	FOREIGN KEY (manager_id) REFERENCES employees (employee_id)
+);
+
+CREATE TABLE dependents (
+	dependent_id INT PRIMARY KEY,
+	first_name VARCHAR (50) NOT NULL,
+	last_name VARCHAR (50) NOT NULL,
+	relationship VARCHAR (25) NOT NULL,
+	employee_id INT NOT NULL,
+	FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
+);