diff --git a/sakila-db/lab_queries.sql b/sakila-db/lab_queries.sql new file mode 100644 index 00000000..5033c87e --- /dev/null +++ b/sakila-db/lab_queries.sql @@ -0,0 +1,90 @@ +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 actor; +SELECT * FROM film; +SELECT * FROM customer; + +-- 3. Retrieve the following columns from their respective tables: -- +-- 3.1 Titles of all films from the film table -- + +SELECT title FROM film; + +-- 3.2 List of languages used in films, with the column aliased as language from the language table -- + +SELECT name AS language +FROM language; + +-- 3.3 List of first names of all employees from the staff table -- + +SELECT first_name FROM staff; + +-- 4. Retrieve unique release years. -- + +SELECT DISTINCT release_year FROM film; + +-- 5. Counting records for database insights: -- +-- 5.1 Determine the number of stores that the company has. -- + +SELECT +COUNT(DISTINCT store_id) +FROM store; + +-- 5.2 Determine the number of employees that the company has. -- + +SELECT +COUNT(DISTINCT staff_id) +FROM staff; + +-- 5.3 Determine how many films are available for rent -- +-- Distinct film titles -- +SELECT +COUNT(DISTINCT film_id) +FROM inventory; + +-- Or total number of films -- +SELECT +COUNT(*) +FROM inventory; + +-- and how many have been rented. -- + +SELECT +COUNT(DISTINCT rental_id) +FROM rental; + +-- 5.4 Determine the number of distinct last names of the actors in the database. -- + +SELECT +COUNT(DISTINCT last_name) +FROM actor; + +-- 6. Retrieve the 10 longest films. -- + +SELECT length +FROM film +ORDER BY length DESC +LIMIT 10; + +-- Use filtering techniques in order to: -- +-- 7.1 Retrieve all actors with the first name "SCARLETT". -- + +SELECT first_name +FROM 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 title +FROM film +WHERE title LIKE '%ARMAGEDDON%' AND length > 100; + +-- 7.3 Determine the number of films that include Behind the Scenes content -- + +SELECT +COUNT(*) +FROM film +WHERE special_features LIKE '%Behind%the%Scenes';