From 107d8e7debd737f907b92989282f82fcea24264f Mon Sep 17 00:00:00 2001 From: D V Date: Wed, 14 Jan 2026 14:23:31 +0100 Subject: [PATCH] lab solved --- sql_basic_queries.sql | 47 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 sql_basic_queries.sql diff --git a/sql_basic_queries.sql b/sql_basic_queries.sql new file mode 100644 index 0000000..cd4742a --- /dev/null +++ b/sql_basic_queries.sql @@ -0,0 +1,47 @@ +# Use sakila database +USE sakila; + +# Display all available tables in the Sakila database. +SHOW tables; + +# Retrieve all the data from the tables actor, film and customer. +SELECT * FROM actor, film, customer; + +# 3. Retrieve the following columns from their respective tables: +# 3.1 Titles of all films from the film table +SELECT title FROM film; + +# 3.2 List of languages used in films, with the column aliased as language from the language table +SELECT name AS language FROM language; + +# 3.3 List of first names of all employees from the staff table +SELECT first_name FROM staff; + +# 4. Retrieve unique release years. +SELECT DISTINCT release_year FROM film; + +# 5. Counting records for database insights: +# 5.1 Determine the number of stores that the company has. +SELECT count(store_id) FROM store; + +# 5.2 Determine the number of employees that the company has. +SELECT count(staff_id) FROM staff; + +# 5.3 Determine how many films are available for rent and how many have been rented. +SELECT count(inventory_id) FROM inventory; +SELECT count(rental_id) FROM rental; + +# 5.4 Determine the number of distinct last names of the actors in the database. +SELECT DISTINCT count(last_name) from actor; + +# 6. Retrieve the 10 longest films. +SELECT film_id, title, length FROM film +ORDER BY length DESC +LIMIT 10; + +# 7. Use filtering techniques in order to: +# 7.1 Retrieve all actors with the first name "SCARLETT" +SELECT first_name, last_name FROM actor +WHERE first_name = "SCARLETT"; + +# 7.2 Retrieve all movies that have ARMAGEDDON in their title and have a duration longer than 100 minutes. \ No newline at end of file