Ruby on Rails ActiveRecord Query Interface

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ActiveRecord is the M in MVC which is the layer of the system responsible for representing business data and logic. The technique that connects the rich objects of an application to tables in a relational database management system is Object Relational Mapper(ORM).

ActiveRecord will perform queries on the database for you and is compatible with most database systems. Regardless of which database system you're using, the ActiveRecord method format will always be the same.

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