diff --git a/Untitled.sql b/Untitled.sql
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+++ b/Untitled.sql
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+use sakila;
+
+-- 1 
+select COUNT(DISTINCT(last_name)) from actor;
+
+-- 2
+SELECT count(distinct(language_id)) from language;
+
+-- 3
+select count(rating) from film
+	where rating = "PG-13";
+    
+-- 4
+select title from film
+	where release_year = 2006
+    order by rental_duration
+    limit 5;
+    
+-- 5 
+select datediff(MIN(rental_date),MAX(rental_date))
+from rental;
+
+-- 6 
+select rental_date,
+	extract(month from rental_date) as rental_month,
+    extract(day from rental_date) as week_day
+    from rental;
+    
+-- 7
+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 
+SELECT * from rental;
+SELECT COUNT(rental_date)
+FROM rental 
+WHERE rental_date LIKE ("2005-08%");
+
+-- 9 
+SELECT rating
+FROM film;
+
+-- 10
+SELECT release_year
+FROM film;
+-- 11
+SELECT title
+FROM film 
+WHERE film.title LIKE ("%ARMAGEDDON%");
+-- 12
+SELECT title
+FROM film 
+WHERE film.title LIKE ("%APOLLO%");
+-- 13
+SELECT title
+FROM film 
+WHERE film.title LIKE ("%APOLLO");
+-- 14
+SELECT title
+FROM film 
+WHERE film.title LIKE ("% DATE%") OR film.title LIKE ("%DATE %");
+-- 15
+SELECT title
+FROM film
+ORDER BY LENGTH(title) DESC
+LIMIT 10;
+
+-- 16
+SELECT length, title
+	FROM film
+    ORDER BY length DESC
+    LIMIT 10;
+    
+-- 17
+SELECT special_features
+	FROM film 
+	WHERE film.special_features = "Behind the Scenes";
+    
+-- 18
+SELECT title
+FROM film 
+ORDER BY film.title ASC, film.release_year
+;
+-- 19
+ALTER TABLE staff 
+DROP COLUMN picture;
+SELECT * from staff;
+
+-- 20
+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, password, last_update)
+VALUES (3, "tammy", "sanders", 79, "TAMMY.SANDERS@sakilacustomer.org", 2, 1,  "Tammy", null, "2006-02-15 04:57:20")
+;
+
+-- 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:
+INSERT INTO rental (rental_date, customer_id, staff_id, inventory_id)
+VALUES (
+	curdate(),
+    (SELECT customer_id FROM customer WHERE first_name = 'CHARLOTTE' AND last_name = 'HUNTER'),
+    (SELECT staff_id FROM staff WHERE first_name = 'Mike' AND last_name = 'Hillyer'),
+    (SELECT max(inventory_id) FROM inventory WHERE film_id = (SELECT max(film_id) FROM film WHERE title = 'Academy Dinosaur') AND store_id = 1)
+);
+-- 22
+SET FOREIGN_KEY_CHECKS=0;
+CREATE TABLE deleted_users AS SELECT customer_id, email, current_date() FROM customer WHERE active = 0;
+DELETE FROM customer WHERE active = 0;
+
+
+