Views in SQL databases are the virtual tables; any view in a database always sits on top of one or more tables. By definition, VIEW contain rows and columns from a SELECT statement from the real table; it could be a combination of one or more tables:
As you can see in the figure, VIEW contains 1 column from TABLE A and two from TABLE B. Tables are joined using a join between two tables.
There are a few benefits when it comes to view creation, and they are as follows:
- Provides a security mechanism
- Can hide the complexity of the table in a view
- Data in the view gets auto-updated whenever the underlying table gets changed ...
