Solved lab

Basic SQL.sql

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+USE sakila;
+
+-- =====================================================
+-- 1. Display all available tables in the Sakila database
+-- =====================================================
+SHOW TABLES;
+
+-- =====================================================
+-- 2. Retrieve all data from actor, film and customer
+-- =====================================================
+SELECT * FROM actor;
+SELECT * FROM film;
+SELECT * FROM customer;
+
+-- =====================================================
+-- 3. Retrieve specific columns
+-- =====================================================
+
+-- 3.1 Titles of all films
+SELECT title
+FROM film;
+
+-- 3.2 List of languages used in films
+SELECT name AS language
+FROM language;
+
+-- 3.3 First names of all employees
+SELECT first_name
+FROM staff;
+
+-- =====================================================
+-- 4. Retrieve unique release years
+-- =====================================================
+SELECT DISTINCT release_year
+FROM film;
+
+-- =====================================================
+-- 5. Counting records for database insights
+-- =====================================================
+
+-- 5.1 Number of stores
+SELECT COUNT(*) AS total_stores
+FROM store;
+
+-- 5.2 Number of employees
+SELECT COUNT(*) AS total_employees
+FROM staff;
+
+-- 5.3 Films available for rent
+SELECT COUNT(*) AS available_films
+FROM inventory;
+
+-- 5.3 Films that have been rented
+SELECT COUNT(DISTINCT inventory_id) AS rented_films
+FROM rental;
+
+-- 5.4 Number of distinct actor last names
+SELECT COUNT(DISTINCT last_name) AS distinct_last_names
+FROM actor;
+
+-- =====================================================
+-- 6. Retrieve the 10 longest films
+-- =====================================================
+SELECT *
+FROM film
+ORDER BY length DESC
+LIMIT 10;
+
+-- =====================================================
+-- 7. Filtering queries
+-- =====================================================
+
+-- 7.1 Actors with the first name "SCARLETT"
+SELECT *
+FROM actor
+WHERE first_name = 'SCARLETT';
+
+-- =====================================================
+-- BONUS
+-- =====================================================
+
+-- 7.2 Movies with ARMAGEDDON in the title and longer than 100 minutes
+SELECT *
+FROM film
+WHERE title LIKE '%ARMAGEDDON%'
+AND length > 100;
+
+-- 7.3 Number of films that include Behind the Scenes content
+SELECT COUNT(*) AS behind_the_scenes_films
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';