Solved lab

lab-basic-queries.sql

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+
+-- LAB | SQL Basic Queries
+-- Database: Sakila
+-- —----------------------------------------------
+
+--  1. Display all available tables --------------
+-- ----------------------------------------------
+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 Languages used in films (alias as language) ----------
+
+SELECT name AS language
+FROM language;
+
+-- 3.3 First names of all employees -----------------
+
+SELECT first_name
+FROM staff;
+
+-- 4. Unique release years -----------
+-- -----------------------------------
+SELECT DISTINCT release_year
+FROM film
+ORDER BY release_year;
+
+-- 5. Counting records ----------------
+-- -----------------------------------
+-- 5.1 Number of stores ----------------
+
+SELECT COUNT(*) AS number_of_stores
+FROM store;
+
+-- 5.2 Number of employees -------------
+SELECT COUNT(*) AS number_of_employees
+FROM staff;
+
+-- 5.3 Films available for rent and films rented ----
+SELECT COUNT(*) AS films_available_for_rent
+FROM inventory;
+
+SELECT COUNT(*) AS films_rented
+FROM rental;
+
+-- 5.4 Distinct actor last names -------------------------------
+SELECT COUNT(DISTINCT last_name) AS distinct_actor_last_names
+FROM actor;
+
+-- 6. Ten longest films -------------------------
+-- --------------------------------------------------
+SELECT title, length
+FROM film
+ORDER BY length DESC
+LIMIT 10;
+
+-- 7. Filtering -----------------------------
+-- ---------------------------------------------
+-- 7.1 Actors with first name 'SCARLETT' ----------------
+SELECT *
+FROM actor
+WHERE first_name = 'SCARLETT';
+
+-- BONUS -------------------------------------------------
+-- 7.2 Movies with ARMAGEDDON in title and length > 100 --
+SELECT title, length
+FROM film
+WHERE title LIKE '%ARMAGEDDON%'
+  AND length > 100;
+
+-- 7.3 Films with Behind the Scenes content -------------
+SELECT COUNT(*) AS films_with_behind_the_scenes
+FROM film
+WHERE special_features LIKE '%Behind the Scenes%';
+
+