lab-sql-basic-queries

lab-sql-basic-queries.sql

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+# Use the sakila database to do the following tasks:
+# Display all available tables in the Sakila database.
+
+USE sakila;
+
+SHOW TABLES 
+FROM sakila;
+
+# Retrieve all the data from the tables actor, film and customer.
+
+SELECT *
+FROM actor, film, customer;
+
+# Retrieve the following columns from their respective tables:
+# Titles of all films from the film table
+
+SELECT film_id, title
+FROM film;
+
+# List of languages used in films, with the column aliased as language from the language table
+
+SELECT language_id, name AS language
+FROM language;
+
+# List of first names of all employees from the staff table
+
+SELECT staff_id, first_name
+FROM staff;
+
+# Retrieve unique release years.
+SELECT DISTINCT release_year
+FROM film;
+
+# Counting records for database insights:
+# Determine the number of stores that the company has.
+
+SELECT COUNT(store_id) AS total_stores
+FROM store;
+
+# Determine the number of employees that the company has.
+
+SELECT COUNT(staff_id) AS total_employees
+FROM staff;
+
+# Determine how many films are available for rent and how many have been rented.
+
+SELECT COUNT(inventory_id) AS available
+FROM inventory;
+
+# and how many have been rented. 
+SELECT COUNT(rental_id) AS rented
+FROM rental;
+
+# Determine the number of distinct last names of the actors in the database.
+
+SELECT DISTINCT last_name
+FROM actor;
+
+# Retrieve the 10 longest films.
+
+SELECT film_id, length
+FROM film
+ORDER BY length DESC
+LIMIT 10;
+
+
+# Use filtering techniques in order to:
+# Retrieve all actors with the first name "SCARLETT".
+
+SELECT first_name, last_name
+FROM actor
+WHERE first_name = 'SCARLETT';
+
+
+