lab basic queries

LAB | SQL Basic Queries.sql

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+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
+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(*) AS number_of_stores
+FROM store;
+
+-- 5.2 Determine the number of employees that the company has
+SELECT COUNT(*) AS number_of_employees
+FROM staff;
+
+-- 5.3 Determine how many films are available for rent and how many have been rented
+SELECT COUNT(DISTINCT film_id) AS films_available_for_rent
+FROM inventory;
+
+SELECT COUNT(DISTINCT inventory.film_id) AS films_rented
+FROM rental
+JOIN inventory
+ON rental.inventory_id = inventory.inventory_id;
+
+-- 5.4 Determine the number of distinct last names of the actors in the database
+SELECT COUNT(DISTINCT last_name) AS distinct_actor_last_names
+FROM actor;
+
+-- 6. Retrieve the 10 longest films
+SELECT title, length
+FROM film
+ORDER BY length DESC
+LIMIT 10;
+
+-- 7. Use filtering techniques
+
+-- 7.1 Retrieve all actors with the first name "SCARLETT"
+SELECT *
+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 *
+FROM film
+WHERE title LIKE '%ARMAGEDDON%'
+  AND length > 100;
+
+-- 7.3 Determine the number of films that include Behind the Scenes content
+SELECT COUNT(*) AS films_with_behind_the_scenes
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';