Large datasets that have many categories and subcategories use multilayered data, and to facilitate data you can create an outline. What is an outline?

Outline is the facility in the database in which the collection of data is displayed in a orderly manner in accordance with the rows and columns. It is structure the data of the database in the hierarchical form.

The outline uses many functions in the data-set like subtotal function for the calculation of the aggregate values and other such function for evaluations