Lab Javier rodriguez

readme.md

@@ -19,11 +19,10 @@ Create a `.sql` file where you'll gather your responses. Either copy them as you
 2. In how many different languages where the films originally produced? (Use the column `language_id` from the `film` table)
 3. How many movies were released with `"PG-13"` rating?
 4. Get 10 the longest movies from 2006.
-5. How many days has been the company operating (check `DATEDIFF()` function)?
+5. How many days has been the company operating (check `DATEDIFF()DATEDIFF()` function)?
 6. Show rental info with additional columns month and weekday. Get 20.
 7. Add an additional column `day_type` with values 'weekend' and 'workday' depending on the rental day of the week.
 8. How many rentals were in the last month of activity?
-
 9. Get film ratings.
 10. Get release years.
 11. Get all films with ARMAGEDDON in the title.

respuestas.sql

@@ -0,0 +1,138 @@
+-- 1. How many distinct (different) actors' last names are there?
+SELECT COUNT(last_name) FROM actor;
+-- 200
+
+-- 2. In how many different languages where the films originally produced? (Use the column `language_id` from the `film` table)
+SELECT COUNT(language_id) FROM film;
+-- 1000
+
+-- 3. How many movies were released with `"PG-13"` rating?
+SELECT COUNT(rating ="PG-13") FROM film;
+-- 1000
+
+-- 4. Get 10 the longest movies from 2006.
+SELECT title, length, release_year = "2006"
+FROM film
+ORDER BY length DESC
+LIMIT 10
+
+-- 5. How many days has been the company operating (check `DATEDIFF()` function)?
+
+SELECT DATEDIFF(MAX(rental_date), MIN(rental_date)) FROM rental;
+-- 266
+
+-- 6. Show rental info with additional columns month and weekday. Get 20.
+SELECT
+    MONTH(rental_date) AS mes,
+    WEEKDAY(rental_date) AS dia
+FROM rental
+limit 20 ;
+
+-- 7. Add an additional column `day_type` with values 'weekend' and 'workday' depending on the rental day of the week.
+ALTER TABLE rental
+ADD COLUMN day_type DATETIME;
+
+UPDATE rental
+set DAYNAME(rental_date) AS rental_weekday,
+
+	WHEN DAYNAME(rental_date) IN ('Saturday', 'Sunday') THEN 'weekend'
+           ELSE 'workday'
+       END AS day_type,
+    rental_day = DAY(rental_date);
+
+-- 8. How many rentals were in the last month of activity?
+
+SELECT  rental_date
+FROM film
+ORDER BY length DESC
+
+
+-- 9. Get film ratings.
+SELECT DISTINCT rating
+FROM film;
+
+-- 10. Get release years.
+SELECT DISTINCT release_year
+FROM film;
+
+-- 11. Get all films with ARMAGEDDON in the title.
+SELECT *
+FROM film
+WHERE title LIKE '%ARMAGEDDON%';
+
+-- 12. Get all films with APOLLO in the title
+SELECT *
+FROM film
+WHERE title LIKE '%APOLLO%';
+
+-- 13. Get all films which title ends with APOLLO.
+SELECT *
+FROM film
+WHERE title LIKE '%APOLLO';
+
+-- 14. Get all films with word DATE in the title.
+SELECT *
+FROM film
+WHERE title LIKE '%date%';
+
+-- 15. Get 10 films with the longest title.
+SELECT *
+FROM film
+ORDER BY length(TITLE) DESC
+limit 10;
+
+-- 16. Get 10 the longest films.
+SELECT * FROM film
+ORDER BY length DESC
+limit 10;
+
+-- 17. How many films include **Behind the Scenes** content?
+SELECT COUNT(special_features)
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';
+
+-- 18. List films ordered by release year and title in alphabetical order.
+SELECT * FROM film
+ORDER BY release_year AND title asc
+
+-- 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,username)
+values 
+("Tammy","Sanders",79,"tammy.sanders@sakilastaff.com",2,1,"Tammy");
+
+
+-- 21. Add rental for movie "Academy Dinosaur" by Charlotte Hunter from Mike Hillyer at Store 1. You can use current date for the `rental_date` column in the `rental` table.
+--    **Hint**: Check the columns in the table rental and see what information you would need to add there. 
+-- You can query those pieces of information. For eg., you would notice that you need `customer_id` information as well.
+-- To get that you can use the following query:
+--   ```sql
+--    select customer_id from sakila.customer
+--    where first_name = 'CHARLOTTE' and last_name = 'HUNTER';
+--    customer_id = 130
+--    film_id = 1
+
+insert into inventory (first_name,last_name,address_id,email,store_id,active,username)
+values 
+("Tammy","Sanders",79,"tammy.sanders@sakilastaff.com",2,1,"Tammy");
+
+    Use similar method to get `inventory_id`, `film_id`, and `staff_id`.
+
+select * from film where title = "Academy Dinosaur";
+
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