No Modification to Blockchain
In a normal database, any data can be changed, updated, or deleted. Blockchain is different: only new information can be added. By its design, existing information can never be updated or deleted.
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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