AnswerPls

Why do we use views?

Asked by Richard Willey on September 18, 2021

Categories: Technology and computing Databases


Rating: 4.3/5 (62 votes)

A view is actually a composition of a table in the form of a predefined SQL query. Views are used for security purpose in databases,views restricts the user from viewing certain column and rows means by using view we can apply the restriction on accessing the particular rows and columns for specificuser.

What is the advantage of using views in SQL? Views can provide advantages over tables: Views can represent a subset of the data contained in a table. Consequently, a view can limit the degree of exposure of the underlying tables to the outer world: agiven user may have permission to query the view, while denied access to the rest of the base table.

What is a data view? A dataview is a view on a datatable, a bit like a sql view. It allows you to filter and sort the rows - often for binding to a windows form control. Additionally, a DataView canbe customized to present a subset of data from the DataTable.

What are the types of views in SQL? There are 2 types of Views in SQL: Simple View and Complex View. Simple views can only contain a single base table. Complex views can be constructed on more than one base table. In particular, complex views can contain: join conditions, a group by clause, a order by clause.