[Marc Folch] lab-mysql-select

lab-mysql-select.sql

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+USE sakila;
+
+-- 1. How many distinct (different) actors' last names are there?
+SELECT first_name, COUNT(*) AS counter 
+FROM actor
+GROUP BY first_name
+HAVING counter = 1;
+
+-- 2. In how many different languages where the films originally produced? (Use the column language_id from the film table)
+SELECT language_id, COUNT(*) AS counter
+FROM film
+GROUP BY language_id;
+
+-- 3. How many movies were released with "PG-13" rating?
+SELECT COUNT(*)
+FROM film
+WHERE rating = "PG-13";
+
+-- 4. Get 10 the longest movies from 2006.
+SELECT title, length, release_year
+FROM film
+WHERE release_year = 2006
+ORDER BY length DESC
+LIMIT 10;
+
+-- 5. How many days has been the company operating (check DATEDIFF() function)?
+SELECT DATEDIFF(MAX(return_date), MIN(rental_date))
+FROM rental;
+
+-- 6. Show rental info with additional columns month and weekday. Get 20.
+SELECT *, MONTH(rental_date) AS month, (WEEKDAY(rental_date) + 1) AS weekday
+FROM rental;
+
+-- 7. Add an additional column day_type with values 'weekend' and 'workday' depending on the rental day of the week.
+SELECT *, IF(WEEKDAY(rental_date) + 1 < 6, "workday", "weekend") AS day_type
+FROM rental;
+
+-- 8. How many rentals were in the last month of activity?
+SELECT COUNT(rental_date)
+FROM rental
+WHERE rental_date LIKE ("2005-08%");
+
+-- 9. Get film ratings.
+SELECT title, rating 
+FROM film;
+
+-- 10. Get release years.
+SELECT title, release_year
+FROM film;
+
+-- 11. Get all films with ARMAGEDDON in the title.
+SELECT title
+FROM film
+WHERE title like "%ARMAGEDDON%";
+
+-- 12. Get all films with APOLLO in the title.
+SELECT title
+FROM film
+WHERE title like "%APOLLO%";
+
+-- 13. Get all films which title ends with APOLLO.
+SELECT title
+FROM film
+WHERE title like "%\APOLLO";
+
+-- 14. Get all films with word DATE in the title.
+SELECT title
+FROM film
+WHERE title like "%DATE%";
+
+-- 15. Get 10 films with the longest title.
+SELECT title
+FROM film
+ORDER BY length(title) DESC
+LIMIT 10;
+
+-- 16. Get 10 the longest films.
+SELECT title, length
+FROM film
+ORDER BY length DESC
+LIMIT 10;
+
+-- 17. How many films include Behind the Scenes content?
+SELECT COUNT(special_features) AS count
+FROM film
+WHERE special_features like "%Behind the Scenes%";
+
+-- 18. List films ordered by release year and title in alphabetical order.
+SELECT title, release_year
+FROM film
+ORDER BY release_year, title;
+
+-- 19. Drop column picture from staff.
+ALTER TABLE staff
+DROP COLUMN picture;
+
+-- 20. A new person is hired to help Jon. Her name is TAMMY SANDERS, and she is a customer. Update the database accordingly.
+INSERT INTO staff(first_name, last_name, address_id, email, store_id, active, last_update, username)
+-- ??? SELECT first_name, last_name, address_id, email, store_id, active, last_update FROM customer ???
+	VALUES ("Tammy", "Sanders", 79, "TAMMY.SANDERS@sakilacustomer.org", 2, 1, "2006-02-15 04:57:20", "tammys");