Solved Lab

lab-sql-basic-queries.sql

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+
+-- 1. Display all available tables in the Sakila database.
+
+USE sakila;
+
+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
+DISTINCT 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) AS number_stores
+FROM store;
+
+-- 5.2 Determine the number of employees that the company has.
+SELECT
+COUNT(DISTINCT staff_id) AS number_staff
+FROM staff;
+
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+SELECT
+COUNT(DISTINCT film_id) AS number_film
+FROM film;
+
+SELECT
+COUNT(rental_id) AS number_rentals
+FROM rental;
+
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT 
+COUNT(DISTINCT last_name) AS number_last_name
+FROM actor;
+
+-- 6. Retrieve the 10 longest films.
+SELECT
+title,
+length
+FROM film
+ORDER BY length DESC
+limit 10;
+
+-- 7. Use filtering techniques in order to:
+-- 7.1 Retrieve all actors with the first name "SCARLETT".
+SELECT
+first_name,
+last_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,
+length
+FROM film
+WHERE (title LIKE '%ARMAGEDDON%') AND (length > 100);
+
+-- 7.3 Determine the number of films that include Behind the Scenes content
+SELECT *
+FROM film;
+
+SELECT
+COUNT(title)
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';