lab

lab-sql-basic-queries.sql

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+-- 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:
+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;
+
+ -- 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.
+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(DISTINCT store_id)
+FROM store;
+
+SELECT 
+COUNT(DISTINCT staff_id)
+FROM staff;
+
+
+SELECT
+    COUNT(DISTINCT i.inventory_id) AS available_for_rent,
+    COUNT(DISTINCT r.inventory_id) AS rented
+FROM inventory i
+LEFT JOIN rental r
+    ON i.inventory_id = r.inventory_id;
+
+
+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:
+
+7.1 Retrieve all actors with the first name "SCARLETT".
+*/
+
+SELECT 
+CONCAT(first_name, ' ', last_name) AS full_name
+FROM actor
+WHERE first_name = 'SCARLETT';
+
+
+-- Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes.
+
+SELECT 
+title
+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%';