Solved lab

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
+-- 3.2 List of languages used in films, with the column aliased as language from the language table
+-- 3.3 List of first names of all employees from the staff table
+SELECT title 
+FROM film;
+
+SELECT name AS language 
+FROM language;
+
+SELECT first_name 
+FROM staff;
+
+-- 4.Retrieve unique release years.
+
+SELECT DISTINCT release_year 
+FROM film;
+
+-- SELECT * FROM sakila.film
+
+
+-- 5.Counting records for database insights:
+-- 5.1 Determine the number of stores that the company has.
+-- 5.2 Determine the number of employees that the company has.
+-- 5.3 Determine how many films are available for rent and how many have been rented.
+-- 5.4 Determine the number of distinct last names of the actors in the database.
+
+
+SELECT COUNT(store_id) AS total_stores 
+FROM store;
+
+SELECT COUNT(staff_id) AS total_employees 
+FROM staff;
+-- SELECT * FROM sakila.staff
+
+-- Total films in inventory 
+SELECT COUNT(inventory_id) AS total_inventory_items
+FROM inventory;
+
+-- Total number of rental transactions ever made
+SELECT COUNT(rental_id) AS total_rentals_item
+FROM rental;
+
+
+ SELECT COUNT(DISTINCT last_name) AS unique_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 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
+
+SELECT title, length
+FROM film
+WHERE title LIKE '%ARMAGEDDON%' 
+  AND length > 100;
+
+  SELECT COUNT(*) AS films_with_behind_the_scenes
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';
+
+
+
+