From 015bbaa958d46f4b68d1bc0ac5d4527661fd9d2e Mon Sep 17 00:00:00 2001
From: David ZN <davidztrading@gmail.com>
Date: Tue, 5 May 2026 19:44:10 +0200
Subject: [PATCH] Lab 6

---
 solution.sql | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 solution.sql

diff --git a/solution.sql b/solution.sql
new file mode 100644
index 0000000..4042f9c
--- /dev/null
+++ b/solution.sql
@@ -0,0 +1,115 @@
+
+-- === EJERCICIO 1: BLOG DATABASE ===
+
+CREATE TABLE authors (
+                         author_id INTEGER PRIMARY KEY AUTOINCREMENT,
+                         author_name TEXT NOT NULL UNIQUE
+);
+
+CREATE TABLE blog_posts (
+                            post_id INTEGER PRIMARY KEY AUTOINCREMENT,
+                            author_id INTEGER NOT NULL,
+                            title TEXT NOT NULL,
+                            word_count INTEGER NOT NULL,
+                            views INTEGER DEFAULT 0,
+                            FOREIGN KEY (author_id) REFERENCES authors(author_id)
+);
+
+INSERT INTO authors (author_name) VALUES ('Maria Charlotte'), ('Juan Perez'), ('Gemma Alcocer');
+
+INSERT INTO blog_posts (author_id, title, word_count, views) VALUES
+                                                                 (1, 'Best Paint Colors', 814, 14),
+                                                                 (2, 'Small Space Decorating Tips', 1146, 221),
+                                                                 (1, 'Hot Accessories', 986, 105),
+                                                                 (1, 'Mixing Textures', 765, 22),
+                                                                 (2, 'Kitchen Refresh', 1242, 307),
+                                                                 (1, 'Homemade Art Hacks', 1002, 193),
+                                                                 (3, 'Refinishing Wood Floors', 1571, 7542);
+
+-- === EJERCICIO 2: AIRLINE DATABASE ===
+
+CREATE TABLE aircrafts (
+                           aircraft_id INTEGER PRIMARY KEY AUTOINCREMENT,
+                           model_name TEXT NOT NULL UNIQUE,
+                           total_seats INTEGER NOT NULL
+);
+
+CREATE TABLE flights (
+                         flight_number TEXT PRIMARY KEY,
+                         aircraft_id INTEGER NOT NULL,
+                         flight_mileage INTEGER NOT NULL,
+                         FOREIGN KEY (aircraft_id) REFERENCES aircrafts(aircraft_id)
+);
+
+CREATE TABLE customers (
+                           customer_id INTEGER PRIMARY KEY AUTOINCREMENT,
+                           customer_name TEXT NOT NULL,
+                           customer_status TEXT DEFAULT 'None',
+                           total_customer_mileage INTEGER DEFAULT 0
+);
+
+CREATE TABLE bookings (
+                          booking_id INTEGER PRIMARY KEY AUTOINCREMENT,
+                          customer_id INTEGER NOT NULL,
+                          flight_number TEXT NOT NULL,
+                          FOREIGN KEY (customer_id) REFERENCES customers(customer_id),
+                          FOREIGN KEY (flight_number) REFERENCES flights(flight_number)
+);
+
+-- Inserción de datos Ejercicio 2
+INSERT INTO aircrafts (model_name, total_seats) VALUES ('Boeing 747', 400), ('Airbus A330', 236), ('Boeing 777', 264);
+
+INSERT INTO flights (flight_number, aircraft_id, flight_mileage) VALUES
+                                                                     ('DL143', 1, 135), ('DL122', 2, 4370), ('DL53', 3, 2078), ('DL222', 3, 1765), ('DL37', 1, 531);
+
+INSERT INTO customers (customer_name, customer_status, total_customer_mileage) VALUES
+                                                                                   ('Agustine Riviera', 'Silver', 115235), ('Alaina Sepulvida', 'None', 6008), ('Tom Jones', 'Gold', 205767),
+                                                                                   ('Sam Rio', 'None', 2653), ('Jessica James', 'Silver', 127656), ('Ana Janco', 'Silver', 136773),
+                                                                                   ('Jennifer Cortez', 'Gold', 300582), ('Christian Janco', 'Silver', 146427);
+
+INSERT INTO bookings (customer_id, flight_number) VALUES
+                                                      (1, 'DL143'), (1, 'DL122'), (2, 'DL122'), (1, 'DL143'), (3, 'DL122'), (3, 'DL53'), (1, 'DL143'), (4, 'DL143'),
+                                                      (3, 'DL222'), (5, 'DL143'), (4, 'DL143'), (6, 'DL222'), (7, 'DL222'), (5, 'DL122'), (4, 'DL37'), (8, 'DL222');
+
+-- Total número de vuelos
+SELECT COUNT(*) AS total_flights FROM flights;
+
+-- Promedio de distancia de vuelo
+SELECT AVG(flight_mileage) AS avg_distance FROM flights;
+
+-- Promedio de asientos por avión
+SELECT AVG(total_seats) AS avg_seats FROM aircrafts;
+
+-- Millas promedio por estatus de cliente
+SELECT customer_status, AVG(total_customer_mileage)
+FROM customers
+GROUP BY customer_status;
+
+-- Máximas millas por estatus
+SELECT customer_status, MAX(total_customer_mileage)
+FROM customers
+GROUP BY customer_status;
+
+-- Aviones Boeing
+SELECT COUNT(*) FROM aircrafts WHERE model_name LIKE '%Boeing%';
+
+-- Vuelos entre 300 y 2000 millas
+SELECT * FROM flights WHERE flight_mileage BETWEEN 300 AND 2000;
+
+-- Promedio de distancia volada según estatus del cliente (JOIN)
+SELECT c.customer_status, AVG(f.flight_mileage)
+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.customer_status;
+
+-- Avión más reservado por miembros Gold
+SELECT a.model_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.customer_status = 'Gold'
+GROUP BY a.model_name
+ORDER BY total_bookings DESC
+LIMIT 1;