diff --git a/LAB_SQL_Basic_Queries.sql b/LAB_SQL_Basic_Queries.sql new file mode 100644 index 0000000..849d03b --- /dev/null +++ b/LAB_SQL_Basic_Queries.sql @@ -0,0 +1,56 @@ +USE sakila; + +-- 1. Display all available tables in the Sakila database. +SHOW TABLES; + +-- 2. 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(*) AS number_stores +FROM store; + +-- 5.2 Determine the number of employees that the company has. +SELECT COUNT(*) AS number_employees +FROM staff; + +-- 5.3 Determine how many films are available for rent and how many have been rented. +SELECT inventory_id +FROM inventory; rental, film ? + +-- 5.4 Determine the number of distinct last names of the actors in the database. +SELECT COUNT(DISTINCT last_name) AS number_last_names +FROM actor; + + +-- 6. Retrieve the 10 longest films. +SELECT 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 actor_id, first_name, last_name +FROM actor +WHERE first_name = "SCARLETT"; +