Differences Between Interfaces and Abstract Classes in JAVA
A difference between JAVA abstract classes and interfaces is that abstract classes can implement some of the methods that they define. Interface methods are always abstract.
MySQL Sandbox with the Sakila sample database
You can go to https://www.katacoda.com/mysql-db-sandbox/scenarios/mysql-sandbox to access the MySQL Sandbox, which has the Sakila sample database loaded in a MySQL instance. You’ll have to set up a (free) Katacoda account. Then, click the Start Scenario button. See also: https://dev.mysql.com/doc/index-other.html
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