handling lab

solution1.sql

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+-----exercise 1 step 2
+
+create table authors(
+                        id int auto_increment primary key,
+                        name varchar(100) not null unique
+);
+
+create table titles(
+                       title_id int auto_increment primary key,
+                       title varchar(100) not null,
+                       word_count int not null,
+                       views int default 0,
+                       author_id int not null,
+                       constraint fk_author
+                           foreign key (author_id) references authors(id)
+);
+
+----exercise 1 step3
+
+insert into  authors(name)
+values
+   ('Maria Charlotte'),
+   ('Juan Perez'),
+   ('Gemma Alcocer');
+
+insert into titles(title, word_count, views, author_id)
+values
+    ('Best Paint Colors', 814,14,1),
+    ('Small Space Decorating Tips', 1146,221,2),
+    ('Hot Accessories',986 ,105,1),
+    ('Mixing Textures',765 ,22,1),
+    ('Kitchen Refresh',1242 ,307,2),
+    ('Homemade Art Hacks',1002 ,193,1),
+    ('Refinishing Wood Floors',1571 ,7542,3);

solution2.sql

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+---Exercise 2 step 2
+
+create table bookings(
+                         booking_id int auto_increment primary key,
+                         customer_id int not null,
+                         constraint fk_customer
+                             foreign key (customer_id) references customers(customer_id),
+                         flight_id int not null,
+                         constraint fk_flight
+                             foreign key (flight_id) references flights(flight_id)
+);
+
+create table flights(
+                        flight_id int auto_increment primary key,
+                        flight_number varchar(50) not null,
+                        aircraft_id int not null,
+                        constraint fk_aircraft
+                            foreign key (aircraft_id) references aircrafts(aircraft_id),
+                        flight_mileage int not null
+);
+
+
+create table aircrafts(
+                          aircraft_id int auto_increment primary key,
+                          aircraft_name varchar(50) not null,
+                          total_aircraft_seats int not null
+);
+
+
+create table customers(
+                          customer_id int auto_increment primary key,
+                          customer_name varchar(100) not null,
+                          customer_status varchar(30) not null,
+                          total_customer_mileage int not null
+);
+
+
+
+-----Exercise 2 step 3
+
+
+insert into aircrafts (aircraft_name, total_aircraft_seats)
+values
+('Boeing 747', 400),
+('Airbus A330', 236),
+('Boeing 777', 264);
+
+
+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', 14642);
+
+
+
+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 bookings (customer_id, flight_id)
+values
+    (1, 1), -- Agustine DL143
+    (1, 2), -- Agustine DL122
+    (2, 2), -- Alaina DL122
+    (3, 2), -- Tom DL122
+    (3, 3), -- Tom DL53
+    (3, 4), -- Tom DL222
+    (4, 1), -- Sam DL143
+    (4, 5), -- Sam DL37
+    (5, 1), -- Jessica DL143
+    (5, 2), -- Jessica DL122
+    (6, 4), -- Ana DL222
+    (7, 4), -- Jennifer DL222
+    (8, 4); -- Christian DL222
+
+----exercise 3
+
+
+-- 1.	Total number of flights:
+-- 2.	Average flight distance:
+-- 3.	Average number of seats per aircraft:
+-- 4.	Average miles flown by customers, grouped by status:
+-- 5.	 Max miles flown by customers, grouped by status:
+-- 6.	Number of aircrafts with "Boeing" in their name:
+-- 7.	Flights with distance between 300 and 2000 miles:
+-- 8.	Average flight distance booked, grouped by customer status:
+-- 9.	Most booked aircraft among Gold status members:
+
+
+select count(*) as total_number_of_flights
+from flights
+
+select avg(flight_mileage) as average_flight_distance
+from flights
+
+select avg(total_aircraft_seats) as average_total_seats
+from aircrafts
+
+select customer_status, avg(total_customer_mileage) as average_total_mileage
+from customers
+group by customer_status
+
+
+select customer_status, max(total_customer_mileage) as average_total_mileage
+from customers
+group by customer_status
+
+select  count(*) as name_with_Boeing
+from aircrafts
+where aircraft_name like '%Boeing%';
+
+
+select * from flights
+where flight_mileage between 300 and 2000
+
+SELECT
+    c.customer_status,
+    AVG(f.flight_mileage) AS avg_flight_distance_booked
+FROM bookings b
+         JOIN customers c ON b.customer_id = c.customer_id
+         JOIN flights f ON b.flight_id = f.flight_id
+GROUP BY c.customer_status;
+
+
+
+SELECT
+    a.aircraft_name,
+    count(*) as total_booking
+FROM bookings b
+         JOIN customers c ON b.customer_id = c.customer_id
+         JOIN flights f ON b.flight_id = f.flight_id
+         join aircrafts a on f.aircraft_id=a.aircraft_id
+where customer_status='Gold'
+group by a.aircraft_name
+ORDER BY total_booking  DESC
+
+