lab solved

sql_basic_queries.sql

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+# Use sakila database
+USE sakila;
+
+# Display all available tables in the Sakila database.
+SHOW tables;
+
+# 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(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(inventory_id) FROM inventory;
+SELECT count(rental_id) FROM rental;
+
+# 5.4 Determine the number of distinct last names of the actors in the database.
+SELECT DISTINCT count(last_name) from actor;
+
+# 6. Retrieve the 10 longest films.
+SELECT film_id, 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 first_name, last_name 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.