From 969086326337654b240cffb703a1f1a9d968b045 Mon Sep 17 00:00:00 2001 From: "patricia.saez" Date: Wed, 25 Oct 2023 18:53:19 +0200 Subject: [PATCH 1/2] PATRICIA S first commit --- lab-mysql-select.sql | 69 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 lab-mysql-select.sql diff --git a/lab-mysql-select.sql b/lab-mysql-select.sql new file mode 100644 index 0000000..8a914f3 --- /dev/null +++ b/lab-mysql-select.sql @@ -0,0 +1,69 @@ +USE sakila; +-- 1-How many distinct (different) actors' last names are there?- +SELECT count(last_name) FROM actor; +-- 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; +-- 3. How many movies were released with `"PG-13"` rating? +SELECT rating, COUNT(rating) AS ct FROM film + WHERE rating = "PG-13"; +-- 4. Get 10 the longest movies from 2006. +SELECT length FROM film LIMIT 10; +-- 5. How many days has been the company operating (check `DATEDIFF()` function)? +SELECT DATEDIFF(max(rental_date),min(rental_date)) FROM rental; +-- 6. Show rental info with additional columns month and weekday. Get 20. +SELECT *, MONTH(rental_date) AS month, DAYOFWEEK(rental_date) as week_day FROM rental LIMIT 20; +-- 7. Add an additional column `day_type` with values 'weekend' and 'workday' depending on the rental day of the week. +SELECT*, + MONTH(rental_Date) AS month, + DAYNAME(rental_date) AS week_day, + CASE + WHEN DAYOFWEEK(rental_date) IN (2, 3, 4, 5, 6) THEN 'workday' + WHEN DAYOFWEEK(rental_date) IN (1 , 7) THEN 'weekend' + END AS day_type +FROM rental; + +-- 8. How many rentals were in the last month of activity? there is only one month + +SELECT COUNT(*) +FROM rental +where rental_date >= (select max(rental_date) from rental) - interval 1 month; + +-- 9. Get film ratings +SELECT rating FROM film; +-- 10. Get release years. +SELECT 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 LENGTH(title) FROM film ORDER BY LENGTH(title) DESC LIMIT 10; +-- 16. Get 10 the longest films. +SELECT length 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 = "Behind the Scenes"; +-- 18. List films ordered by release year and title in alphabetical order. +SELECT * 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. +SELECT * FROM staff where first_name = "Jon"; -- Store_id = 2 +INSERT INTO staff(first_name, last_name, address_id,store_id,active,username,last_update) VALUES ("TAMMY","SANDERS",4,2,1,"TAMMY", '2023-10-25' ); +-- 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: + + select customer_id from sakila.customer + where first_name = 'CHARLOTTE' and last_name = 'HUNTER'; -- costumer_id = 130 + select film_id from sakila.film + where title = 'Academy Dinosaur'; -- film_id = 1 + select inventory_id from sakila.inventory + where film_id = 1 AND store_id = 1; -- inventory_id = 1 a 4 + select staff_id from sakila.staff + where first_name = 'Mike' and last_name = 'Hillyer'; -- staff_id = 1 + INSERT INTO rental(rental_date, inventory_id, customer_id,staff_id,last_update) VALUES ("2023-10-25",3,130,1,'2023-10-25' ) From 7633116a7b955d7693786505cfbb236d68a733cb Mon Sep 17 00:00:00 2001 From: "patricia.saez" Date: Wed, 25 Oct 2023 19:21:47 +0200 Subject: [PATCH 2/2] PATRICIA S Finished --- lab-mysql-select.sql | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/lab-mysql-select.sql b/lab-mysql-select.sql index 8a914f3..7d6ed6b 100644 --- a/lab-mysql-select.sql +++ b/lab-mysql-select.sql @@ -66,4 +66,23 @@ INSERT INTO staff(first_name, last_name, address_id,store_id,active,username,las where film_id = 1 AND store_id = 1; -- inventory_id = 1 a 4 select staff_id from sakila.staff where first_name = 'Mike' and last_name = 'Hillyer'; -- staff_id = 1 - INSERT INTO rental(rental_date, inventory_id, customer_id,staff_id,last_update) VALUES ("2023-10-25",3,130,1,'2023-10-25' ) + INSERT INTO rental(rental_date, inventory_id, customer_id,staff_id,last_update) VALUES ("2023-10-26",3,130,1,'2023-10-26' ); + +-- 22. Delete non-active users, but first, create a _backup table_ `deleted_users` to store `customer_id`, `email`, and the `date` for the users that would be deleted. Follow these steps: + -- Check if there are any non-active users + -- Create a table _backup table_ as suggested + -- Insert the non active users in the table _backup table_ + -- Delete the non active users from the table _customer_ + +SELECT COUNT(active) FROM customer where active = 0; -- there are 15 +CREATE TABLE back_up_table AS SELECT * FROM customer where active = 0; -- directly importing to this table those non active +SELECT * FROM back_up_table; + +-- Delete the non active users from the table customer raises an error so we must we must "deshabilitar" las foreign keys primero +SET FOREIGN_KEY_CHECKS=0; + -- now we can delete +DELETE FROM customer +WHERE active = 0; +-- I cannot delate because of 0 129 19:17:51Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column. + -- To disable safe mode, toggle the option in Preferences -> SQL Editor and reconnect. 0.000 sec​ +select * from customer;