Marcus Ikdal

sql/films/create-films.sql

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+CREATE TABLE films(
+    id serial primary key,
+    title varchar(255) not null,
+    genre varchar(255) not null,
+    releaseYear int not null,
+    score int,
+    unique(title)
+)

sql/films/ext1.sql

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+/* Return the average film rating */
+select avg(score) from films;
+
+/* Return the total number of films */
+select count(*) from films;
+
+/* Return the average film rating by genre */
+select genre, avg(score) from films
+group by genre
+order by avg desc;

sql/films/ext2.sql

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+CREATE TABLE directors(
+    directorId int,
+    name varchar(255),
+    unique(directorId)
+);
+
+CREATE TABLE films(
+    id serial primary key,
+    title varchar(255) not null,
+    genre varchar(255) not null,
+    releaseYear int not null,
+    score int,
+    directorId int,
+    CONSTRAINT fk_directorId
+    FOREIGN KEY(directorId) REFERENCES directors(directorId),
+    unique(title)
+);
+
+INSERT INTO directors (directorId, name) VALUES
+    (1, 'Quentin Tarantino'),
+    (2, 'Christopher Nolan'),
+    (3, 'Martin Scorsese'),
+    (4, 'Stanley Kubrick');
+
+INSERT INTO films (title, genre, releaseYear, score, directorId) VALUES
+('The Shawshank Redemption', 'Drama', 1994, 9, 1),
+('The Godfather', 'Crime', 1972, 9, 3),
+('The Dark Knight', 'Action', 2008, 9, 2),
+('Alien', 'SciFi', 1979, 9, 1),
+('Total Recall', 'SciFi', 1990, 8, 2),
+('The Matrix', 'SciFi', 1999, 8, 4),
+('The Matrix Resurrections', 'SciFi', 2021, 5, 4),
+('The Matrix Reloaded', 'SciFi', 2003, 6, 4),
+('The Hunt for Red October', 'Thriller', 1990, 7, 1),
+('Misery', 'Thriller', 1990, 7, 1),
+('The Power Of The Dog', 'Western', 2021, 6, 3),
+('Hell or High Water', 'Western', 2016, 8, 1),
+('The Good the Bad and the Ugly', 'Western', 1966, 9, 4),
+('Unforgiven', 'Western', 1992, 7, 4);
+
+/* Return all movies with director names */
+select title, directors.name from films
+inner join directors on films.directorId = directors.directorId;

sql/films/ext3.sql

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+select directors.name, count(*) from films
+inner join directors on films.directorId = directors.directorId
+group by directors.name;

sql/films/insert-films.sql

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+INSERT INTO films (title, genre, releaseYear, 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/select-films.sql

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+/* 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 releaseYear; 
+
+/* All films with a rating of 8 or higher */
+select * from films
+where score >= 8;
+
+/* All films with a rating of 7 or lower */
+select * from films
+where score <= 7;
+
+/* films released in 1990 */
+select * from films
+where releaseYear = 1990;
+
+/* films released before 2000 */
+select * from films
+where releaseYear < 2000;
+
+/* films released after 1990 */
+select * from films
+where releaseYear > 1990;
+
+/* films released between 1990 and 1999 */
+select * from films
+where releaseYear > 1990 and releaseYear < 1999;
+
+/* 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 releaseYear < 2000;
+
+/* films that have the word "Matrix" in their title */
+select * from films
+where title like '%Matrix%';