diff --git a/lab_sql_basic_queries.sql b/lab_sql_basic_queries.sql new file mode 100644 index 0000000..f18cd3f --- /dev/null +++ b/lab_sql_basic_queries.sql @@ -0,0 +1,61 @@ +-- 1. Display all available tables in the Sakila database. + +USE sakila; +SHOW TABLES; + + +-- 2. Retrieve all the data from the tables actor, film and customer. +SELECT * FROM actor; +SELECT * FROM film; +SELECT * FROM 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(*) FROM store; + +-- 5.2 Determine the number of employees that the company has. +SELECT COUNT(*) FROM staff; + +-- 5.3 Determine how many films are available for rent and how many have been rented. +SELECT COUNT(*) FROM inventory; # the ones available for rent +SELECT COUNT(*) FROM rental; #the ones that have been rented + +-- 5.4 Determine the number of distinct last names of the actors in the database. +SELECT DISTINCT last_name FROM actor; # only the names of distinct last names +SELECT COUNT(DISTINCT last_name) FROM actor; # number of distinct last names + + +-- 6. Retrieve the 10 longest films. +SELECT * 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 * 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. +SELECT * FROM film +WHERE title LIKE '%ARMAGEDDON%' AND length > 100; + +-- 7.3 Determine the number of films that include Behind the Scenes content +SELECT COUNT(*) FROM film +WHERE special_features LIKE '%Behind the Scenes%';