write a program to show the usage of sql in the database file?

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write a program to show the usage of sql in the database file?..

Answer / Neha Agrawal

In Ruby on Rails, you can interact with the database using Active Record, an ORM (Object-Relational Mapping) framework. Here's a simple example that demonstrates how to retrieve and display all users from the 'users' table:nnFirst, make sure you have a 'users' table in your development database by running the following migration:n```rubynrails generate model User email:stringn```nThen, run the migration to create the 'users' table:n```bashnrails db:migraten```nNow, create a controller and an action to handle the request:n```rubynrails generate controller Users indexn```nFinally, edit 'app/controllers/users_controller.rb' to include the following code in the 'index' action:n```rubyndef index
@users = User.all
end```nWith these steps completed, navigate to '/users' in your web browser and you should see all users listed.nnHere's a brief explanation of the code:n- `rails generate model User email:string` generates a new model file for a 'User' class with an 'email' attribute.n- `rails db:migrate` creates the 'users' table in the development database based on the 'User' model.n- `rails generate controller Users index` generates a new controller and action for displaying all users.n- In the 'index' action, we retrieve all records from the 'users' table using the `User.all` method and assign them to the instance variable '@users'.n

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