Wilmer Winkler

SQL.sql

@@ -0,0 +1,94 @@
+//Core
+
+CREATE TABLE films(
+ id serial primary key,
+ title TEXT not null,
+ genre TEXT not null,
+ year integer,
+ score integer,
+  unique (title)
+)
+
+
+insert into films(title, genre, year, score) VALUES('The Shawshank Redemption', 'Drama', 1994, 9);
+insert into films(title, genre, year, score) VALUES('The Godfather', 'Crime', 1972, 9);
+insert into films(title, genre, year, score) VALUES('The Dark Knight', 'Action', 2008, 9);
+insert into films(title, genre, year, score) VALUES('Alien', 'SciFi', 1979, 9);
+insert into films(title, genre, year, score) VALUES('Total Recall', 'SciFi', 1990, 8);
+insert into films(title, genre, year, score) VALUES('The Matrix', 'SciFi', 1999, 8);
+insert into films(title, genre, year, score) VALUES('The Matrix Resurrections', 'SciFi', 2021, 5);
+insert into films(title, genre, year, score) VALUES('The Matrix Reloaded', 'SciFi', 2003, 6);
+insert into films(title, genre, year, score) VALUES('The Hunt for Red October', 'Thriller', 1990, 7);
+insert into films(title, genre, year, score) VALUES('Misery', 'Thriller', 1990, 7);
+insert into films(title, genre, year, score) VALUES('The Power Of The Dog', 'Western', 2021, 6);
+insert into films(title, genre, year, score) VALUES('Hell or High Water', 'Western', 2016, 8);
+insert into films(title, genre, year, score) VALUES('The Good the Bad and the Ugly', 'Western', 1966, 9);
+insert into films(title, genre, year, score) VALUES('Unforgiven', 'Western', 1992, 7);
+
+
+SELECT * from films
+SELECT * FROM films ORDER BY score DESC
+SELECT * FROM films ORDER BY year ASC
+SELECT * FROM films WHERE score > 7
+SELECT * FROM films WHERE score < 8
+SELECT * FROM films WHERE year = 1990
+SELECT * FROM films WHERE year < 1990
+SELECT * FROM films WHERE year BETWEEN 1990 AND 1999
+SELECT * FROM films WHERE genre = 'SciFi'
+SELECT * FROM films WHERE genre = 'SciFi' OR genre = 'Western'
+SELECT * FROM films WHERE genre != 'SciFi'
+SELECT * FROM films WHERE genre = 'Western'AND year < 2000
+SELECT * FROM films WHERE title LIKE '%Matrix%'
+
+//Extension 1
+
+SELECT AVG(score) as Avarage_movie_score FROM films
+SELECT Count(*) FROM films
+SELECT genre, AVG(score) as Average_score_by_genre FROM films GROUP BY genre
+
+//Extension 2
+
+CREATE TABLE directors(
+ directorId int primary key,
+ name TEXT not null,
+  unique (directorId)
+)
+
+drop table films
+
+CREATE TABLE films(
+ id serial primary key,
+ title TEXT not null,
+ genre TEXT not null,
+ year integer,
+ score integer,
+ directorId int,
+  unique (title),
+  FOREIGN KEY (directorID) REFERENCES directors(directorId)
+)
+
+insert into directors(directorId, name) VALUES(1, 'Will');
+insert into directors(directorId, name) VALUES(2, 'Bill');
+insert into directors(directorId, name) VALUES(3, 'Phill');
+
+insert into films(title, genre, year, score, directorId) VALUES('The Shawshank Redemption', 'Drama', 1994, 9, 1);
+insert into films(title, genre, year, score, directorId) VALUES('The Godfather', 'Crime', 1972, 9, 1);
+insert into films(title, genre, year, score, directorId) VALUES('The Dark Knight', 'Action', 2008, 9, 1);
+insert into films(title, genre, year, score, directorId) VALUES('Alien', 'SciFi', 1979, 9, 1);
+insert into films(title, genre, year, score, directorId) VALUES('Total Recall', 'SciFi', 1990, 8, 2);
+insert into films(title, genre, year, score, directorId) VALUES('The Matrix', 'SciFi', 1999, 8, 2);
+insert into films(title, genre, year, score, directorId) VALUES('The Matrix Resurrections', 'SciFi', 2021, 5, 2);
+insert into films(title, genre, year, score, directorId) VALUES('The Matrix Reloaded', 'SciFi', 2003, 6, 2);
+insert into films(title, genre, year, score, directorId) VALUES('The Hunt for Red October', 'Thriller', 1990, 7, 3);
+insert into films(title, genre, year, score, directorId) VALUES('Misery', 'Thriller', 1990, 7, 3);
+insert into films(title, genre, year, score, directorId) VALUES('The Power Of The Dog', 'Western', 2021, 6, 3);
+insert into films(title, genre, year, score, directorId) VALUES('Hell or High Water', 'Western', 2016, 8, 3);
+insert into films(title, genre, year, score, directorId) VALUES('The Good the Bad and the Ugly', 'Western', 1966, 9, 3);
+insert into films(title, genre, year, score, directorId) VALUES('Unforgiven', 'Western', 1992, 7, 3);
+
+SELECT * FROM films JOIN directors ON films.directorId = directors.directorid;
+
+//Extension 3
+
+SELECT Count(films.directorid) as Number_of_films, directors.name FROM films JOIN directors ON films.directorId = directors.directorid
+GROUP BY directors.name