Question

how many types of views define it ?​

Answer 1

Answer:

There are total four types of views, based on the way in which the view is implemented and the methods that are permitted for accessing the view data. They are - Database Views, Projection Views, Maintenance Views, and Helps Views,.

Answer 2

Views and their types:

Explanation:

• A view is a database subset that is created from a user query and saved as a permanent object. In a SQL database, for example, a view becomes a form of virtual table with filtered rows and columns that match those of the original database.

• To create depth in a photograph, the three types of perspective—linear, colour, and atmospheric—can be employed separately or in combination. The linear perspective necessitates the most research.
• These views can have several basis tables or be built on multiple base tables, and they have a group by clause, join conditions, and an order by clause. It includes groupings of data and can be utilised with group functions. DML operations cannot always be performed using complex views.