Alejandro de Tuero_solved_lab

basic-queries.sql

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+#Check
+
+USE sakila;
+
+SHOW FULL TABLES;
+
+SELECT count(*) FROM film;
+
+SELECT COUNT(*) FROM film_text;
+
+# Display all available tables in the Sakila database.
+SHOW FULL TABLES;
+
+# Retrieve all the data from the tables actor, film and customer.
+SELECT * FROM actor, film, 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 f.title, l.name as language
+FROM sakila.film f inner join sakila.language l on f.language_id = l.language_id;
+
+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(*) FROM store;
+
+SELECT count(*) FROM staff;
+
+SELECT
+    (SELECT COUNT(*) 
+     FROM inventory)                      AS films_available_for_rent,
+    (SELECT COUNT(DISTINCT inventory_id)  
+     FROM rental)                         AS films_rented;
+
+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:
+
+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.*/
+
+/* 7.2 Hint: use LIKE operator. More information here.
+7.3 Determine the number of films that include Behind the Scenes content*/
+
+SELECT * 
+FROM film
+WHERE title  like '%ARMAGEDDON%' AND length > 100;
+
+SELECT COUNT(*)
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';