diff --git a/sql_normalization_lab.sql b/sql_normalization_lab.sql
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+-- Ironhack LAB | SQL Normalization, DDL & Aggregation
+-- Generated: 2025-10-05T15:43:49.533193Z
+-- Target: MySQL 8.x
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS=0;
+
+-- Create and use a dedicated database (optional)
+DROP DATABASE IF EXISTS ironhack_lab;
+CREATE DATABASE ironhack_lab CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+USE ironhack_lab;
+
+-- =============================
+-- Exercise 1: BLOG schema
+-- =============================
+DROP TABLE IF EXISTS posts;
+DROP TABLE IF EXISTS authors;
+
+CREATE TABLE authors (
+  author_id INT AUTO_INCREMENT PRIMARY KEY,
+  name VARCHAR(100) NOT NULL UNIQUE
+) ENGINE=InnoDB;
+
+CREATE TABLE posts (
+  post_id INT AUTO_INCREMENT PRIMARY KEY,
+  author_id INT NOT NULL,
+  title VARCHAR(255) NOT NULL,
+  word_count INT CHECK (word_count >= 0),
+  views INT CHECK (views >= 0),
+  CONSTRAINT fk_posts_author FOREIGN KEY (author_id) REFERENCES authors(author_id)
+) ENGINE=InnoDB;
+
+-- Authors
+INSERT INTO authors (author_id, name) VALUES (1, 'Gemma Alcocer');
+INSERT INTO authors (author_id, name) VALUES (2, 'Juan Perez');
+INSERT INTO authors (author_id, name) VALUES (3, 'Maria Charlotte');
+
+-- Posts
+INSERT INTO posts (author_id, title, word_count, views) VALUES (3, 'Best Paint Colors', 814, 14);
+INSERT INTO posts (author_id, title, word_count, views) VALUES (2, 'Small Space Decorating Tips', 1146, 221);
+INSERT INTO posts (author_id, title, word_count, views) VALUES (3, 'Hot Accessories', 986, 105);
+INSERT INTO posts (author_id, title, word_count, views) VALUES (3, 'Mixing Textures', 765, 22);
+INSERT INTO posts (author_id, title, word_count, views) VALUES (2, 'Kitchen Refresh', 1242, 307);
+INSERT INTO posts (author_id, title, word_count, views) VALUES (3, 'Homemade Art Hacks', 1002, 193);
+INSERT INTO posts (author_id, title, word_count, views) VALUES (1, 'Refinishing Wood Floors', 1571, 7542);
+
+-- =============================
+-- Exercise 2: AIRLINE schema
+-- =============================
+DROP TABLE IF EXISTS bookings;
+DROP TABLE IF EXISTS flights;
+DROP TABLE IF EXISTS aircrafts;
+DROP TABLE IF EXISTS customers;
+
+CREATE TABLE customers (
+  customer_id INT AUTO_INCREMENT PRIMARY KEY,
+  name VARCHAR(100) NOT NULL UNIQUE,
+  status ENUM('None','Silver','Gold') NOT NULL DEFAULT 'None',
+  total_mileage INT NOT NULL CHECK (total_mileage >= 0)
+) ENGINE=InnoDB;
+CREATE TABLE aircrafts (
+  aircraft_id INT AUTO_INCREMENT PRIMARY KEY,
+  name VARCHAR(100) NOT NULL UNIQUE,
+  total_seats INT NOT NULL CHECK (total_seats > 0)
+) ENGINE=InnoDB;
+CREATE TABLE flights (
+  flight_number VARCHAR(10) PRIMARY KEY,
+  aircraft_id INT NOT NULL,
+  mileage INT NOT NULL CHECK (mileage >= 0),
+  CONSTRAINT fk_flights_aircraft FOREIGN KEY (aircraft_id) REFERENCES aircrafts(aircraft_id)
+) ENGINE=InnoDB;
+CREATE TABLE bookings (
+  booking_id INT AUTO_INCREMENT PRIMARY KEY,
+  customer_id INT NOT NULL,
+  flight_number VARCHAR(10) NOT NULL,
+  booked_at TIMESTAMP NULL DEFAULT NULL,
+  CONSTRAINT fk_bookings_customer FOREIGN KEY (customer_id) REFERENCES customers(customer_id),
+  CONSTRAINT fk_bookings_flight FOREIGN KEY (flight_number) REFERENCES flights(flight_number)
+) ENGINE=InnoDB;
+
+-- Aircrafts
+INSERT INTO aircrafts (aircraft_id, name, total_seats) VALUES (1, 'Airbus A330', 236);
+INSERT INTO aircrafts (aircraft_id, name, total_seats) VALUES (2, 'Boeing 747', 400);
+INSERT INTO aircrafts (aircraft_id, name, total_seats) VALUES (3, 'Boeing 777', 264);
+
+-- Customers
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (1, 'Agustine Rivera', 'Silver', 115235);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (2, 'Alaina Sepulvida', 'None', 6008);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (3, 'Ana Janco', 'Silver', 136773);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (4, 'Christian Janco', 'Silver', 14642);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (5, 'Jennifer Cortez', 'Gold', 300582);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (6, 'Jessica James', 'Silver', 127656);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (7, 'Sam Rio', 'None', 2653);
+INSERT INTO customers (customer_id, name, status, total_mileage) VALUES (8, 'Tom Jones', 'Gold', 205767);
+
+-- Flights
+INSERT INTO flights (flight_number, aircraft_id, mileage) VALUES ('DL122', 1, 4370);
+INSERT INTO flights (flight_number, aircraft_id, mileage) VALUES ('DL143', 2, 135);
+INSERT INTO flights (flight_number, aircraft_id, mileage) VALUES ('DL222', 3, 1765);
+INSERT INTO flights (flight_number, aircraft_id, mileage) VALUES ('DL37', 2, 531);
+INSERT INTO flights (flight_number, aircraft_id, mileage) VALUES ('DL53', 3, 2078);
+
+-- Bookings (one per visible row)
+INSERT INTO bookings (customer_id, flight_number) VALUES (1, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (1, 'DL122');
+INSERT INTO bookings (customer_id, flight_number) VALUES (2, 'DL122');
+INSERT INTO bookings (customer_id, flight_number) VALUES (1, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (8, 'DL122');
+INSERT INTO bookings (customer_id, flight_number) VALUES (8, 'DL53');
+INSERT INTO bookings (customer_id, flight_number) VALUES (1, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (7, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (1, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (8, 'DL222');
+INSERT INTO bookings (customer_id, flight_number) VALUES (6, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (7, 'DL143');
+INSERT INTO bookings (customer_id, flight_number) VALUES (3, 'DL222');
+INSERT INTO bookings (customer_id, flight_number) VALUES (5, 'DL222');
+INSERT INTO bookings (customer_id, flight_number) VALUES (6, 'DL122');
+INSERT INTO bookings (customer_id, flight_number) VALUES (7, 'DL37');
+INSERT INTO bookings (customer_id, flight_number) VALUES (4, 'DL222');
+
+-- Helpful indexes
+CREATE INDEX idx_customers_status ON customers(status);
+CREATE INDEX idx_flights_mileage ON flights(mileage);
+CREATE INDEX idx_aircrafts_name ON aircrafts(name);
+CREATE INDEX idx_bookings_customer ON bookings(customer_id);
+CREATE INDEX idx_bookings_flight ON bookings(flight_number);
+
+-- =============================
+-- Exercise 3: Queries
+-- =============================
+-- 1) Total number of flights
+SELECT COUNT(DISTINCT flight_number) AS total_flights FROM flights;
+
+-- 2) Average flight distance
+SELECT AVG(mileage) AS avg_distance FROM flights;
+
+-- 3) Average number of seats per aircraft
+SELECT AVG(total_seats) AS avg_seats FROM aircrafts;
+
+-- 4) Average miles flown by customers, grouped by status
+SELECT status, AVG(total_mileage) AS avg_miles FROM customers GROUP BY status;
+
+-- 5) Max miles flown by customers, grouped by status
+SELECT status, MAX(total_mileage) AS max_miles FROM customers GROUP BY status;
+
+-- 6) Number of aircrafts with 'Boeing' in their name
+SELECT COUNT(*) AS boeing_aircrafts FROM aircrafts WHERE name LIKE '%Boeing%';
+
+-- 7) Flights with distance between 300 and 2000 miles
+SELECT * FROM flights WHERE mileage BETWEEN 300 AND 2000;
+
+-- 8) Average flight distance booked, grouped by customer status
+SELECT c.status, AVG(f.mileage) AS avg_booked_distance
+FROM bookings b
+JOIN customers c ON b.customer_id = c.customer_id
+JOIN flights f ON b.flight_number = f.flight_number
+GROUP BY c.status;
+
+-- 9) Most booked aircraft among Gold status members
+SELECT a.name, COUNT(*) AS total_bookings
+FROM bookings b
+JOIN customers c ON b.customer_id = c.customer_id
+JOIN flights f ON b.flight_number = f.flight_number
+JOIN aircrafts a ON f.aircraft_id = a.aircraft_id
+WHERE c.status = 'Gold'
+GROUP BY a.name
+ORDER BY total_bookings DESC
+LIMIT 1;
+
+SET FOREIGN_KEY_CHECKS=1;
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