Matilda Sönnergaard

queries.sql

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+DORP TABLE FILMS;
+
+CREATE TABLE IF NOT EXISTS films (
+  id SERIAL PRIMARY KEY,
+  title TEXT,
+  genre TEXT,
+  release_year INTEGER,
+  score INTEGER,
+  UNIQUE(title)
+);
+
+TRUNCATE TABLE films;
+
+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 Wate', 'Western', 2016, 8),
+      ('The Good the Bad and the Ugly', 'Western', 1966, 9),
+      ('Unforgiven', 'Western', 1992, 7);
+
+-- All films
+SELECT * FROM films;
+
+-- All films ordered by rating desc
+SELECT * FROM films
+ORDER BY score DESC;
+
+-- All films ordered by year asc
+SELECT * FROM films
+ORDER BY release_year;
+
+-- All films rating >= 8
+SELECT * FROM films
+WHERE score >= 8;
+
+-- All films rating <= 7
+SELECT * FROM films
+WHERE SCORE <= 7;
+
+-- All films 1990
+SELECT * FROM films
+WHERE release_year = 1990;
+
+-- Films before 2000
+SELECT * FROM films
+WHERE release_year <= 2000;
+
+-- Films after 1990
+SELECT * FROM films
+WHERE release_year >= 1990;
+
+-- Films between 1990-2000
+SELECT * FROM films
+WHERE release_year BETWEEN 1990 AND 1999;  -- inclusive on both ends
+
+-- SciFi films
+SELECT * FROM films
+WHERE genre = 'SciFi';
+
+-- Western or SciFi
+SELECT * FROM films
+WHERE genre = 'SciFi' OR genre = 'Western';
+
+-- No SciFi
+SELECT * FROM films
+WHERE genre != 'SciFi';
+
+-- Pre-2000 Westerns
+SELECT * FROM films
+WHERE genre = 'Western' AND release_year < 2000;
+
+-- Films with Matrix in title
+SELECT * FROM films
+WHERE title LIKE '%Matrix%';
+
+-- ######## EXTENSION 1 ########
+
+-- Average film rating
+SELECT AVG(score) as average_score FROM films;
+
+-- Number of films
+SELECT COUNT(*) AS number_of_films FROM films;
+
+-- Average rating by genre
+SELECT genre, AVG(score) as average_score FROM films
+GROUP BY genre;
+
+-- ######## EXTENSION 2 ########
+
+CREATE TABLE IF NOT EXISTS directors (
+  id INTEGER PRIMARY KEY,
+  name TEXT
+);
+
+TRUNCATE TABLE directors;
+
+INSERT INTO directors (id, name)
+VALUES
+			(1, 'Mr. Director'),
+      (2, 'Director Jr.'),
+      (3, 'Director Directorson');
+
+
+DROP TABLE films2;
+CREATE TABLE IF NOT EXISTS films2 (
+  id SERIAL PRIMARY KEY,
+  title TEXT,
+  genre TEXT,
+  release_year INTEGER,
+  score INTEGER,
+  director_id INTEGER REFERENCES directors(id),
+  UNIQUE(title)
+);
+
+TRUNCATE TABLE films2;
+
+INSERT INTO films2
+(title, genre, release_year, score, director_id)
+VALUES
+			('The Shawshank Redemption', 'Drama', 1994, 9, 1),
+      ('The Godfather', 'Crime', 1972, 9, 1),
+      ('The Dark Knight', 'Action', 2008, 9, 2),
+      ('Alien', 'SciFi', 1979, 9, 3),
+      ('Total Recall', 'SciFi', 1990, 8, 2),
+      ('The Matrix', 'SciFi', 1999, 8, 2),
+      ('The Matrix Resurrections', 'SciFi', 2021, 5, 2),
+      ('The Matrix Reloaded', 'SciFi', 2003, 6, 1),
+      ('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 Wate', 'Western', 2016, 8, 1),
+      ('The Good the Bad and the Ugly', 'Western', 1966, 9, 2),
+      ('Unforgiven', 'Western', 1992, 7, 3);
+
+-- Films with director
+SELECT title, name FROM films2
+INNER JOIN directors
+	ON films2.director_id = directors.id;
+
+-- EXTENSION 3: directors with number of films
+SELECT name, COUNT(*) FROM directors
+INNER JOIN films2
+	ON directors.id = films2.director_id
+GROUP BY name;