From 375fcfd0ae09980b37f45bfebe84bd6a9988540b Mon Sep 17 00:00:00 2001 From: jannajulianfeiten Date: Sat, 20 Sep 2025 11:45:20 +0100 Subject: [PATCH 1/3] Lab solved --- Lab_3.2_solved.sql | 69 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Lab_3.2_solved.sql diff --git a/Lab_3.2_solved.sql b/Lab_3.2_solved.sql new file mode 100644 index 0000000..5ef5a17 --- /dev/null +++ b/Lab_3.2_solved.sql @@ -0,0 +1,69 @@ +USE sakila; + +-- 1 Display all available tables in the Sakila database. +SHOW TABLES; + +-- 2 Retrieve all the data from the tables actor, film and customer. +SELECT * FROM sakila.actor; +SELECT*FROM sakila.film; +SELECT * FROM sakila.customer + + +-- 3 Retrieve the following columns from their respective tables: +-- 3.1 Titles of all films from the film table +SELECT title FROM sakila.film + +-- 3.2 List of languages used in films, with the column aliased as language from the language table +SELECT name AS language +FROM sakila.language; + +-- 3.3 List of first names of all employees from the staff table +SELECT first_name + FROM sakila.staff; + + -- 4 Retrieve unique release years. +SELECT DISTINCT(release_year) +FROM sakila.film; + + +-- 5 Counting records for database insights: +-- 5.1 Determine the number of stores that the company has. +SELECT SUM(store_id) +FROM sakila.store +WHERE store_id IS NOT NULL; + +-- 5.3 Determine how many films are available for rent and how many have been rented. +SELECT * from sakila.inventory +SELECT * FROM sakila.rental + +SELECT COUNT(*) AS total_copies_available +FROM inventory; + +SELECT COUNT( inventory_id) AS total_rentals +FROM rental; + +SELECT + (SELECT COUNT(*) FROM inventory) AS total_copies_available, + (SELECT COUNT(inventory_id) FROM rental) AS total_rentals + +-- 5.4 Determine the number of distinct last names of the actors in the database. + +select DISTINCT last_name from sakila.actor + +-- 6 Retrieve the 10 longest films. +SELECT length FROM sakila.film +ORDER BY length DESC +LIMIT 10; + +-- Use filtering techniques in order to: +-- 7.1 Retrieve all actor with the first name "SCARLETT". +Select last_name FROM sakila.actor +WHERE last_name = 'SCARLETT'; + +-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes. +SELECT * FROM sakila.film +WHERE title LIKE '%ARMAGEDDON%'AND length > 100 + +-- 7.3 Determine the number of films that include Behind the Scenes content + + From cbb3851bd6ef600f41774285da2b40116cffdce6 Mon Sep 17 00:00:00 2001 From: jannajulianfeiten Date: Sat, 20 Sep 2025 11:54:46 +0100 Subject: [PATCH 2/3] solved lab --- Lab_3.2_solved.sql | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Lab_3.2_solved.sql b/Lab_3.2_solved.sql index 5ef5a17..ab1795b 100644 --- a/Lab_3.2_solved.sql +++ b/Lab_3.2_solved.sql @@ -27,11 +27,17 @@ FROM sakila.film; -- 5 Counting records for database insights: + -- 5.1 Determine the number of stores that the company has. SELECT SUM(store_id) FROM sakila.store WHERE store_id IS NOT NULL; +-- 5.2 Determine the number of employees that the company has. +SELECT COUNT(staff_id) FROM sakila.staff; +WHERE staff_id IS NOT NULL; + + -- 5.3 Determine how many films are available for rent and how many have been rented. SELECT * from sakila.inventory SELECT * FROM sakila.rental From 4cfa56c4250d4343007a5c57dde5ddd31a29c438 Mon Sep 17 00:00:00 2001 From: jannajulianfeiten Date: Sat, 20 Sep 2025 12:20:02 +0100 Subject: [PATCH 3/3] Lab solved --- Lab_3.2_solved.sql | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/Lab_3.2_solved.sql b/Lab_3.2_solved.sql index ab1795b..9c6ce09 100644 --- a/Lab_3.2_solved.sql +++ b/Lab_3.2_solved.sql @@ -6,12 +6,12 @@ SHOW TABLES; -- 2 Retrieve all the data from the tables actor, film and customer. SELECT * FROM sakila.actor; SELECT*FROM sakila.film; -SELECT * FROM sakila.customer +SELECT * FROM sakila.customer; -- 3 Retrieve the following columns from their respective tables: -- 3.1 Titles of all films from the film table -SELECT title FROM sakila.film +SELECT title FROM sakila.film; -- 3.2 List of languages used in films, with the column aliased as language from the language table SELECT name AS language @@ -29,13 +29,12 @@ FROM sakila.film; -- 5 Counting records for database insights: -- 5.1 Determine the number of stores that the company has. -SELECT SUM(store_id) +SELECT COUNT(store_id) FROM sakila.store WHERE store_id IS NOT NULL; -- 5.2 Determine the number of employees that the company has. SELECT COUNT(staff_id) FROM sakila.staff; -WHERE staff_id IS NOT NULL; -- 5.3 Determine how many films are available for rent and how many have been rented. @@ -45,7 +44,7 @@ SELECT * FROM sakila.rental SELECT COUNT(*) AS total_copies_available FROM inventory; -SELECT COUNT( inventory_id) AS total_rentals +SELECT COUNT(inventory_id) AS total_rentals FROM rental; SELECT @@ -54,22 +53,23 @@ SELECT -- 5.4 Determine the number of distinct last names of the actors in the database. -select DISTINCT last_name from sakila.actor +SELECT COUNT(DISTINCT last_name) from sakila.actor; -- 6 Retrieve the 10 longest films. -SELECT length FROM sakila.film +SELECT title FROM sakila.film ORDER BY length DESC LIMIT 10; -- Use filtering techniques in order to: -- 7.1 Retrieve all actor with the first name "SCARLETT". -Select last_name FROM sakila.actor -WHERE last_name = 'SCARLETT'; +Select first_name FROM sakila.actor +WHERE first_name = 'SCARLETT'; -- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes. SELECT * FROM sakila.film WHERE title LIKE '%ARMAGEDDON%'AND length > 100 -- 7.3 Determine the number of films that include Behind the Scenes content - +SELECT COUNT(*) FROM sakila.film +WHERE special_features LIKE '%Behind the Scenes%';