done

code.sql

@@ -0,0 +1,103 @@
+use sakila;
+#1
+select count(distinct last_name) from actor;
+#2
+select count(distinct language_id) from film;
+#3
+select count(distinct film_id) from film where rating = "PG-13";
+select * from film where rating = "PG-13";
+#4
+select title from film 
+where release_year = "2006" 
+order by length desc
+limit 10;
+#5
+select datediff(max(rental_date), min(rental_date)) from rental;
+#6
+select rental_id, rental_date, staff_id, month(rental_date) as moth, weekday(rental_date) as weekday from rental 
+order by rental_date desc
+limit 20;
+
+#7
+ALTER TABLE rental
+ADD day_type varchar(40);
+set sql_safe_updates = 0;
+update rental
+	set day_type =
+    case
+		when weekday(rental_date) in (0,1,2,3,4,5) then "Weekday" 
+        when weekday(rental_date) in (6,7) then "Weekend"
+	end;
+select * from rental;
+#8
+select month(max(rental_date)) as max_month, year(max(rental_date)) as year_max from rental;
+select count(rental_id) 
+	from rental 
+	where (month(rental_date), year(rental_date)) = (
+    select month(max(rental_date)), year(max(rental_date))
+    from rental);
+#9 Get film ratings
+select rating, count(rating) as count
+	from film
+    group by rating;
+#10 Get release years
+select release_year, count(release_year) as count
+	from film
+    group by release_year;
+#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 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 * 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 title asc, release_year asc;
+# 19 Drop column picture from staff.
+alter table staff
+drop 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 customer
+	where first_name = "Tammy" and last_name = "Sanders";
+insert into staff(staff_id,first_name,last_name,address_id,email,store_id,active,username, last_update)
+	select customer_id,first_name,last_name,address_id,email,store_id,active,"-",last_update
+	from customer
+    where first_name = "Tammy" and last_name = "Sanders";
+# 21 - didn't do
+insert into rental(rental_date, inventory_id, customer_id, staff_id, last_uptade)
+values ("2023-10-25 04:44:31", inventotry_id, 130, 
+
+select * from rental;
+
+select customer_id from sakila.customer
+where first_name = 'CHARLOTTE' and last_name = 'HUNTER';
+
+#22
+create table deleted_users as select customer_id, email from customer;
+
+select customer_id, email from customer
+	where active = 0;
+insert into deleted_users(customer_id, email)
+	select customer_id,email
+	from customer
+    where active = 0;
+SET FOREIGN_KEY_CHECKS = 0;
+delete from customer
+	where active = 0;