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The Sakila Database

One of the best example databases out there is the Sakila Database, which was originally created by MySQL and has been open sourced under the terms of the BSD License.

The Sakila database is a nicely normalised schema modelling a DVD rental store, featuring things like films, actors, film-actor relationships, and a central inventory table that connects films, stores, and rentals.

The Sakila Database ERD

The database allows for nice example queries like the following one that finds the actor with most films (PostgreSQL syntax):

SELECT first_name, last_name, count(*) films
FROM actor AS a
JOIN film_actor AS fa USING (actor_id)
GROUP BY actor_id, first_name, last_name
ORDER BY films DESC
LIMIT 1;

 

first_name    last_name    films
--------------------------------
GINA          DEGENERES       42

Or, let's calculate the cumulative revenue of all stores (PostgreSQL syntax):

SELECT payment_date, amount, sum(amount) OVER (ORDER BY payment_date)
FROM (
  SELECT CAST(payment_date AS DATE) AS payment_date, SUM(amount) AS amount
  FROM payment
  GROUP BY CAST(payment_date AS DATE)
) p
ORDER BY payment_date;

 

payment_date       amount         sum
-------------------------------------
2005-05-24          29.92       29.92
2005-05-25         573.63      603.55
2005-05-26         754.26     1357.81
2005-05-27         685.33     2043.14
2005-05-28         804.04     2847.18
2005-05-29         648.46     3495.64
2005-05-30         628.42     4124.06
2005-05-31         700.37     4824.43
2005-06-14          57.84     4882.27
2005-06-15        1376.52     6258.79
2005-06-16        1349.76     7608.55
2005-06-17        1332.75     8941.30
...

Want to play around with the Sakila database? We're hosting several ported versions of the original database on GitHub, including versions for:

  • DB2
  • Interbase
  • MS Access (why not?)
  • MySQL
  • Oracle
  • PostgreSQL
  • SQL Server
  • SQLite
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