uploading lab

lab-sql-basic-queries.sql

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+USE sakila;
+-- Display all available tables in the Sakila database.
+SHOW TABLES;
+
+-- Retrieve all the data from the tables actor, film and customer.
+SELECT * FROM actor;
+SELECT * FROM film;
+SELECT * FROM customer;
+
+-- Retrieve the following columns from their respective tables:
+-- -- 1 Titles of all films from the film table
+SELECT title FROM film;
+
+-- -- 2 List of languages used in films, with the column aliased as language from the language table
+SELECT name AS language FROM language;
+
+-- -- 3 List of first names of all employees from the staff table
+SELECT first_name FROM staff;
+
+-- Retrieve unique release years.
+SELECT DISTINCT release_year FROM film;
+
+-- Counting records for database insights:
+-- -- 1 Determine the number of stores that the company has.
+SELECT COUNT(DISTINCT(store_id)) FROM store;
+
+-- -- 2 Determine the number of employees that the company has.
+SELECT COUNT(DISTINCT(staff_id)) FROM staff;
+
+-- -- .3 Determine how many films are available for rent and how many have been rented.
+SELECT COUNT(DISTINCT inventory_id) AS available_films FROM inventory;
+SELECT COUNT(DISTINCT inventory_id) AS films_rented FROM rental;
+
+-- -- 4 Determine the number of distinct last names of the actors in the database.
+SELECT COUNT(DISTINCT 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:
+-- -- 1. Retrieve all actors with the first name "SCARLETT".
+SELECT * FROM actor WHERE first_name="SCARLETT";
+
+-- -- .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;
+
+-- -- 3 Determine the number of films that include Behind the Scenes content
+SELECT * FROM film WHERE special_features='Behind the Scenes';