SourceMaking— is the best information source on the Web on such software development topics as design patterns, refactoring and UML. A lot of information freely available through the site's pages
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
Collections are analogous to tables in relational databases. If a collection does not exist, MongoDB creates the collection when you first store data for that collection.
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