solved lab-basic-queries

sql_basics.sql

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+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;
+
+## 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;
+
+## 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(film_id) FROM film;
+SELECT count(rental_id) FROM rental;
+#5.4 Determine the number of distinct last names of the actors in the database
+SELECT count(DISTINCT last_name) FROM actor;
+
+#6 Retrieve the 10 longest films.
+SELECT * FROM film 
+order by length DESC
+LIMIT 10;
+
+## Use filtering techniques in order to:
+#7 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%"