André Chamoun

sql/extension/extension1/select.sql

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+select AVG(score) as avg_score from films
+
+SELECT COUNT(*) AS total_films FROM films;
+
+SELECT genre, ROUND(AVG(score), 2) AS avg_score
+FROM films
+GROUP BY genre
+ORDER BY avg_score DESC, genre;

sql/extension/extension2/directors.sql

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+DROP TABLE IF EXISTS films CASCADE;
+DROP TABLE IF EXISTS directors CASCADE;
+
+CREATE TABLE directors (
+    director_id SERIAL PRIMARY KEY,
+    name VARCHAR(255) NOT NULL UNIQUE
+);
+
+CREATE TABLE films (
+    film_id SERIAL PRIMARY KEY,
+    title VARCHAR(255) NOT NULL UNIQUE,
+    genre VARCHAR(255) NOT NULL,
+    release_year INTEGER NOT NULL,
+    score INTEGER NOT NULL CHECK (score BETWEEN 0 AND 10),
+    director_id  INTEGER REFERENCES directors(director_id)
+);
+
+INSERT INTO directors (name) VALUES
+         ('Frank Darabont'),
+         ('Francis Ford Coppola'),
+         ('Christopher Nolan'),
+         ('Ridley Scott'),
+         ('Paul Verhoeven'),
+         ('Lana Wachowski'),
+         ('John McTiernan'),
+         ('Rob Reiner'),
+         ('Jane Campion'),
+         ('David Mackenzie'),
+         ('Sergio Leone'),
+         ('Clint Eastwood');
+
+INSERT INTO films (title, genre, release_year, score, director_id) VALUES
+       ('The Shawshank Redemption','Drama',   1994, 9, (SELECT director_id FROM directors WHERE name='Frank Darabont')),
+       ('The Godfather',           'Crime',   1972, 9, (SELECT director_id FROM directors WHERE name='Francis Ford Coppola')),
+       ('The Dark Knight',         'Action',  2008, 9, (SELECT director_id FROM directors WHERE name='Christopher Nolan')),
+       ('Alien',                   'SciFi',   1979, 9, (SELECT director_id FROM directors WHERE name='Ridley Scott')),
+       ('Total Recall',            'SciFi',   1990, 8, (SELECT director_id FROM directors WHERE name='Paul Verhoeven')),
+       ('The Matrix',              'SciFi',   1999, 8, (SELECT director_id FROM directors WHERE name='Lana Wachowski')),
+       ('The Matrix Resurrections','SciFi',   2021, 5, (SELECT director_id FROM directors WHERE name='Lana Wachowski')),
+       ('The Matrix Reloaded',     'SciFi',   2003, 6, (SELECT director_id FROM directors WHERE name='Lana Wachowski')),
+       ('The Hunt for Red October','Thriller',1990, 7, (SELECT director_id FROM directors WHERE name='John McTiernan')),
+       ('Misery',                  'Thriller',1990, 7, (SELECT director_id FROM directors WHERE name='Rob Reiner')),
+       ('The Power Of The Dog',    'Western', 2021, 6, (SELECT director_id FROM directors WHERE name='Jane Campion')),
+       ('Hell or High Water',      'Western', 2016, 8, (SELECT director_id FROM directors WHERE name='David Mackenzie')),
+       ('The Good the Bad and the Ugly','Western',1966,9,(SELECT director_id FROM directors WHERE name='Sergio Leone')),
+       ('Unforgiven',              'Western', 1992, 7, (SELECT director_id FROM directors WHERE name='Clint Eastwood'));

sql/extension/extension2/select.sql

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+SELECT f.title, f.genre, f.release_year, f.score, d.name AS director
+FROM films f
+         JOIN directors d ON d.director_id = f.director_id
+ORDER BY f.release_year, f.title;

sql/extension/extension3/select.sql

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+SELECT d.name AS director, COUNT(f.film_id) AS film_count
+FROM directors d
+         LEFT JOIN films f ON f.director_id = d.director_id
+GROUP BY d.director_id, d.name
+ORDER BY film_count DESC, director;

sql/films/create-films.sql

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+create table films (
+    film_id SERIAL primary key,
+    title varchar(255) not null unique,
+    genre varchar(255) not null,
+    release_year INTEGER not null,
+    score integer not null check (score between 0 and 10)
+);

sql/films/insert-films.sql

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+INSERT INTO films (title, genre, release_year, score) VALUES
+      ('The Shawshank Redemption', 'Drama',   1994, 9),
+      ('The Godfather',            'Crime',   1972, 9),
+      ('The Dark Knight',          'Action',  2008, 9),
+      ('Alien',                    'SciFi',   1979, 9),
+      ('Total Recall',             'SciFi',   1990, 8),
+      ('The Matrix',               'SciFi',   1999, 8),
+      ('The Matrix Resurrections', 'SciFi',   2021, 5),
+      ('The Matrix Reloaded',      'SciFi',   2003, 6),
+      ('The Hunt for Red October', 'Thriller',1990, 7),
+      ('Misery',                   'Thriller',1990, 7),
+      ('The Power Of The Dog',     'Western', 2021, 6),
+      ('Hell or High Water',       'Western', 2016, 8),
+      ('The Good the Bad and the Ugly','Western',1966, 9),
+      ('Unforgiven',               'Western', 1992, 7);

sql/films/selects-films.sql

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+select * from films;
+
+select * from films order by score desc, title;
+
+select * from films order by release_year asc, title
+
+select * from films where score >= 8
+
+select * from films where score <= 7
+
+select * from films where release_year = 1990
+
+select * from films where release_year < 2000
+
+SELECT * FROM films WHERE release_year > 1990;
+
+SELECT * FROM films WHERE release_year BETWEEN 1990 AND 1999;
+
+SELECT * FROM films WHERE genre = 'SciFi';
+
+SELECT * FROM films WHERE genre = 'Western' or genre = 'SciFi'
+
+SELECT * FROM films WHERE genre <> 'SciFi';
+
+SELECT * FROM films WHERE genre = 'Western' AND release_year < 2000;
+
+SELECT * FROM films WHERE title ILIKE '%Matrix%';