David Stern

sql/products/core.sql

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+
+create table if not exists films (
+id integer generated always as identity primary key,
+title VARCHAR(64) not null unique,
+genre VARCHAR(32) not null,
+release_year integer not null,
+score integer not null,
+constraint score_of_ten check (score > 0 and score < 11)
+);
+
+-- Insert
+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);
+
+
+-- Select
+-- Select all films
+select * 
+from films
+
+-- All films ordered by rating descending
+select * 
+from films 
+order by score desc
+
+-- All films ordered by release year ascending
+select *
+from films
+order by release_year asc
+
+-- All films with a rating of 8 or higher
+select *
+from films
+where score > 7
+
+-- All films with a rating of 7 or lower
+select *
+from films
+where score < 8
+
+-- films released in 1990
+select * 
+from films
+where release_year = 1990
+
+-- films released before 2000
+select * 
+from films
+where release_year < 2000
+
+-- films released after 1990
+select * 
+from films 
+where release_year > 1990
+
+-- films released between 1990 and 1999
+select * 
+from films 
+where (release_year < 2000 and release_year > 1979)
+
+-- films with the genre of "SciFi"
+select *
+from films 
+where genre = 'SciFi'
+
+-- films with the genre of "Western" or "SciFi"
+select *
+from films 
+where (genre = 'SciFi' or genre = 'Western')
+
+-- films with any genre apart from "SciFi"
+select *
+from films
+where genre != 'SciFi'
+
+-- films with the genre of "Western" released before 2000
+select *
+from films 
+where (genre = 'Western' and release_year < 2000)
+
+
+-- films that have the word "Matrix" in their title
+select *
+from films
+where title like '%Matrix%'
+
+

sql/products/extensions.sql

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+-- Extension 1
+-- Select average score
+select avg(score) as average_score
+from films
+
+-- Select total number of films
+select count(title)
+from films
+
+-- Select average score grouped by genre
+select genre, avg(score) as average_score
+from films
+group by genre
+
+
+-- Extension 2
+-- Create directors table
+create table if not exists directors (
+directorId integer generated always as identity primary key,
+name varchar(50) not null unique
+)
+
+-- Create new version of films that include reference to director
+create table if not exists films_extension (
+    id integer generated always as identity primary key,
+    title varchar(100) not null unique,
+    genre varchar(32) not null,
+    release_year integer not null,
+    score integer not null,
+    directorId integer not null,
+    constraint score_of_ten check (score > 0 and score < 11),
+    constraint fk_director foreign key (directorId) references directors(directorId)
+)
+
+-- Insert into directors
+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 new films table
+insert into films_extension (title, genre, release_year, score, directorId) values
+('The Shawshank Redemption', 'Drama', 1994, 9, 1),
+('The Godfather', 'Crime', 1972, 9, 2),
+('The Dark Knight', 'Action', 2008, 9, 3),
+('Alien', 'SciFi', 1979, 9, 4),
+('Total Recall', 'SciFi', 1990, 8, 5),
+('The Matrix', 'SciFi', 1999, 8, 6),
+('The Matrix Resurrections', 'SciFi', 2021, 5, 6),
+('The Matrix Reloaded', 'SciFi', 2003, 6, 6),
+('The Hunt for Red October', 'Thriller', 1990, 7, 7),
+('Misery', 'Thriller', 1990, 7, 8),
+('The Power Of The Dog', 'Western', 2021, 6, 9),
+('Hell or High Water', 'Western', 2016, 8, 10),
+('The Good the Bad and the Ugly', 'Western', 1966, 9, 11),
+('Unforgiven', 'Western', 1992, 7, 12);
+
+
+-- Select films and their director
+select f.title, f.genre, f.release_year, f.score, d.name as director
+from films_extension f
+join directors d on f.directorId = d.directorId;
+
+
+-- Extension 3
+-- Select all directors and number of films they have directed
+select count(f.title) as film_count, d.name as director
+from directors d
+join films_extension f on d.directorId = f.directorId
+group by d.name
+order by film_count desc