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update #300

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update #300

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22 changes: 22 additions & 0 deletions lab subqueries.sql
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use sakila;
#Determine the number of copies of the film "Hunchback Impossible" that exist in the inventory system.



select count(*) as number_of_copies
from inventory
where film_id =
(select film_id
from film
where title = "Hunchback Impossible");

# List all films whose length is longer than the average length of all the films in the Sakila database.


SELECT title, length
FROM film
WHERE length >
(SELECT AVG(length)
FROM film);

# Use a subquery to display all actors who appear in the film "Alone Trip".