Explain what is ORM (Object-Relationship-Model) in Rails?

ORM (Object-Relational Mapping) is a technique used in Rails to interact with a database using Ruby code instead of writing raw SQL queries. Active Record is the ORM framework used in Rails that provides this functionality[1][2].

Active Record maps Ruby classes to database tables, and instances of those classes to rows in the corresponding table[1][2]. It allows you to create, read, update, and delete data in the database using Ruby methods, without having to write SQL statements directly[1].

Some key benefits of using Active Record's ORM in Rails include[1][2]:

• Abstracting away the differences between different database systems, so you can use Ruby code regardless of the underlying database
• Providing a more object-oriented way to work with data, ...