diff --git a/Normalization.pdf b/Normalization.pdf
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diff --git a/airline.sql b/airline.sql
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+DROP SCHEMA IF EXISTS lab;
+CREATE SCHEMA lab;
+USE lab;
+
+-- DDL 
+CREATE TABLE customer(
+	id INT NOT NULL AUTO_INCREMENT,
+	customer_name VARCHAR(255),
+	customer_status VARCHAR(20),
+	total_customer_mileage INT,
+	PRIMARY KEY(id)
+);
+
+CREATE TABLE aircraft(
+	id INT NOT NULL AUTO_INCREMENT,
+	aircraft_name VARCHAR(255),
+	total_aircraft_seats INT,
+	PRIMARY KEY(id)
+);
+
+CREATE TABLE flight(
+	id INT NOT NULL AUTO_INCREMENT,
+	flight_number VARCHAR(255),
+	aircraft_id INT,
+	flight_mileage INT,
+	PRIMARY KEY(id),
+	FOREIGN KEY(aircraft_id) REFERENCES aircraft(id)
+);
+
+CREATE TABLE fact(
+	id INT NOT NULL AUTO_INCREMENT,
+	customer_id INT,
+	flight_id INT,
+	PRIMARY KEY(id),
+	FOREIGN KEY (customer_id) REFERENCES customer(id),
+	FOREIGN KEY (flight_id) REFERENCES flight(id)
+);
+
+-- DML
+
+INSERT INTO aircraft (aircraft_name, total_aircraft_seats) VALUES 
+('Boeing 747', 400),
+('Boeing 777', 264),
+('Airbus A330', 236);
+
+INSERT INTO flight (flight_number,aircraft_id,flight_mileage) VALUES
+('DL143',1,135),
+('DL122',3,4370),
+('DL53',2,2078),
+('DL222',2,1765),
+('DL37',1,531);
+
+INSERT INTO customer (customer_name,customer_status,total_customer_mileage) VALUES
+('Agustine Riviera','Silver',115235),
+('Alaina Sepluvida','None', 6008),
+('Tom Jones','Gold', 205767),
+('Sam Rio','None', 2653),
+('Jessica James','Silver', 136773),
+('Ana Janco','Silver', 136773),
+('Jennifer Cortez','Gold', 300582),
+('Christian Janco','Silver',14642);
+
+INSERT INTO fact (customer_id, flight_id) VALUES
+(1,1),
+(1,2),
+(2,2),
+(3,2),
+(3,3),
+(4,1),
+(3,4),
+(5,1),
+(6,4),
+(7,4),
+(5,2),
+(4,5),
+(8,4);
+
+-- QUERIES
+
+SELECT COUNT(*) FROM flight;
+SELECT AVG(flight_mileage) FROM flight;
+SELECT AVG(total_aircraft_seats) FROM aircraft;
+SELECT AVG(total_customer_mileage),customer_status FROM customer GROUP BY customer_status;
+SELECT MAX(total_customer_mileage),customer_status FROM customer GROUP BY customer_status;
+SELECT COUNT(*) FROM aircraft WHERE aircraft_name LIKE'%boeing%';
+SELECT * FROM flight WHERE flight_mileage BETWEEN 300 AND 2000;
+SELECT AVG(f.flight_mileage),c.customer_status FROM flight f JOIN
+fact t ON f.id=t.flight_id JOIN customer c ON
+t.customer_id=c.id GROUP BY c.customer_status;
+SELECT a.aircraft_name,COUNT(t.id) AS count FROM fact t JOIN flight f ON t.flight_id=f.id
+JOIN aircraft a ON f.aircraft_id=a.id JOIN customer c ON t.customer_id=c.id WHERE c.customer_status = "GOLD"
+GROUP BY a.aircraft_name ORDER BY count DESC LIMIT 1;
+
+
diff --git a/books.sql b/books.sql
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+++ b/books.sql
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+DROP SCHEMA IF EXISTS books;
+CREATE SCHEMA books;
+USE books;
+
+-- DDL 
+CREATE TABLE book(
+	id INT NOT NULL AUTO_INCREMENT,
+	book_title VARCHAR(255),
+	word_count INT,
+	views INT,
+	PRIMARY KEY(id)
+);
+
+CREATE TABLE author(
+	id INT NOT NULL AUTO_INCREMENT,
+	author_name VARCHAR(255),
+	book_id INT,
+	PRIMARY KEY(id),
+	FOREIGN KEY(book_id) REFERENCES book(id)
+);
+