add files

Author: kristian9577

09.Table Relations - Lab/camp_db.sql

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+CREATE DATABASE camp;
+use camp;
+
+CREATE TABLE rooms(
+	id INT PRIMARY KEY,
+	occupation VARCHAR(20) not null,
+	beds_count int not null
+);
+
+CREATE TABLE vehicles(
+	id int primary key auto_increment not null,
+	driver_id int not null,
+	vehicle_type varchar(30) not null,
+	passengers int not null
+);
+
+CREATE TABLE campers(
+	id INT PRIMARY KEY auto_increment,
+	first_name varchar(20) not null,
+	last_name varchar(20) not null,
+	age int not null,
+	room int,
+	vehicle_id int,
+	CONSTRAINT fk_room_id FOREIGN KEY(room) REFERENCES rooms(id),
+  	CONSTRAINT fk_vehicle_id FOREIGN KEY(vehicle_id) REFERENCES vehicles(id) on delete cascade
+);
+
+CREATE TABLE routes(
+	id INT PRIMARY KEY auto_increment,
+	starting_point varchar(30) not null,
+	end_point varchar(30) not null,
+	leader_id int not null,
+	route_time TIME NOT NULL,	
+	CONSTRAINT fk_leader_id FOREIGN KEY(leader_id) REFERENCES campers(id)
+);
+
+insert into rooms(id,occupation,beds_count) values(101,"occupied",3),
+(102,"free",3),
+(103,"free",3),
+(104,"free",2),
+(105,"free",2),
+(201,"free",3),
+(202,"free",3),
+(203,"free",2),
+(204,"free",3),
+(205,"free",3),
+(301,"free",2),
+(302,"free",2),
+(303,"free",2),
+(304,"free",3),
+(305,"free",3);
+
+insert into campers(first_name, last_name, age,room) values("Simo", "Sheytanov", 20,101),
+("Roli", "Dimitrova", 27,102),
+("RoYaL", "Yonkov", 25,301),
+("Ivan", "Ivanov", 28,301),
+("Alisa", "Terzieva", 25,102),
+("Asya", "Ivanova", 26,102),
+("Dimitar", "Verbov", 21,301),
+("Iskren", "Ivanov", 28,302),
+("Bojo", "Gevechanov", 28,302);
+
+insert into vehicles(driver_id,vehicle_type,passengers) values
+(1,"bus",20),
+(2,"van",10),
+(1,"van",10),
+(4,"car",5),
+(5,"car",5),
+(6,"car",4),
+(7,"car",3),
+(8,"bus",3);
+
+insert into routes(starting_point,end_point,leader_id,route_time) values
+("Hotel Malyovitsa", "Malyovitsa Peak", 3, '02:00:00'),
+("Hotel Malyovitsa", "Malyovitsa Hut", 3, '00:40:00'),
+("Ribni Ezera Hut", "Rila Monastery", 3, '06:00:00'),
+("Borovets", "Musala Peak", 4, '03:30:00');

09.Table Relations - Lab/table_relations_lab.sql

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+-- 1.	 Mountains and Peaks
+
+CREATE TABLE mountains (
+    id INT UNSIGNED NOT NULL  AUTO_INCREMENT ,
+    name VARCHAR(50) NOT NULL,
+    CONSTRAINT pk_mountains PRIMARY KEY(id)
+);
+
+CREATE TABLE peaks (
+    id INT UNSIGNED NOT NULL AUTO_INCREMENT,
+    name VARCHAR(50) NOT NULL,
+    mountain_id INT UNSIGNED,
+    CONSTRAINT pk_peaks PRIMARY KEY(id),
+    CONSTRAINT fk_peaks_mountains FOREIGN KEY (mountain_id)
+        REFERENCES mountains (id)
+);
+
+-- 2.	 Trip Organization
+
+SELECT 
+    v.driver_id,
+    v.vehicle_type,
+    CONCAT_WS(' ', c.first_name, c.last_name) AS driver_name
+FROM
+    campers AS c
+        JOIN
+    vehicles AS v ON c.id = v.driver_id;
+    
+    -- 3.	SoftUni Hiking
+    
+    SELECT 
+    r.starting_point,
+    r.end_point,
+    r.leader_id,
+    CONCAT_WS(' ', c.first_name, c.last_name) AS leader_name
+FROM
+    campers AS c
+        JOIN
+    routes AS r ON c.id = r.leader_id;
+    
+    -- 5.	 Project Management DB*
+    CREATE DATABASE company;
+USE company;
+
+CREATE TABLE employees (
+    id INT UNIQUE NOT NULL AUTO_INCREMENT,
+    first_name VARCHAR(30) NOT NULL,
+    last_name VARCHAR(30) NOT NULL,
+    project_id INT UNIQUE,
+    CONSTRAINT pk_employees PRIMARY KEY (id)
+);
+
+CREATE TABLE clients (
+    id INT UNIQUE NOT NULL AUTO_INCREMENT,
+    client_name VARCHAR(100) NOT NULL,
+    project_id INT UNIQUE,
+    CONSTRAINT pk_clients PRIMARY KEY (id)
+);
+
+CREATE TABLE projects (
+    id INT UNIQUE NOT NULL AUTO_INCREMENT,
+    client_id INT UNIQUE,
+    project_lead_id INT UNIQUE,
+    CONSTRAINT pk_projects PRIMARY KEY (id)
+);
+
+ALTER TABLE employees 
+	ADD CONSTRAINT fk_projects_employees FOREIGN KEY (project_id) REFERENCES projects(id);
+    
+ALTER TABLE clients 
+	ADD CONSTRAINT fk_projects_clients FOREIGN KEY (project_id) REFERENCES projects(id);
+    
+ALTER TABLE projects 
+	ADD CONSTRAINT fk_clients_projects FOREIGN KEY (client_id) REFERENCES clients(id),
+    ADD CONSTRAINT fk_emoloyees_projects FOREIGN KEY (project_lead_id) REFERENCES employees(id);