solved lab

sqd_basic_queries.sql

@@ -0,0 +1,59 @@
+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;
+
+-- Counting records for database insights:
+
+-- 5.1 Determine the number of stores that the company has.
+SELECT COUNT(store_id) as "Number_of_stores" FROM store;
+
+-- 5.2 Determine the number of employees that the company has.
+SELECT COUNT(staff_id) FROM staff;
+
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+SELECT COUNT(DISTINCT film_id) from inventory;
+
+SELECT COUNT(DISTINCT i.film_id) AS films_rented FROM rental AS r
+JOIN inventory AS i 
+ON r.inventory_id = i.inventory_id;
+
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT DISTINCT COUNT(last_name) FROM actor;
+
+-- Retrieve the 10 longest films.
+SELECT title, 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 * FROM actor
+WHERE first_name = "SCARLETT";
+
+-- BONUS:
+
+-- 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes.
+
+-- Hint: use LIKE operator. More information here.
+-- 7.3 Determine the number of films that include Behind the Scenes content