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What is the different between a view and a create view?
View is a virtual table that do not have any data of its own but have data that is derived from another table called base table. Create view is the command used to create a view (virtual table).
Why create view in database?
A View is similar to a Table and can be mistaken for a table by a novice application developer. CREATE VIEW VIEW_NAME AS SQL QUERY Here the SQL Query includes the Select query on a table that is to be displayed as a View. The view is a read only structure that only displays contents from a table and the user cannot insert or update or delete any data in the underlying table. Views are generally created to impose access restrictions to a specific subset of users whom you do not want to give full access but at the same time want them to view the data.
How do you view all the tables created in the database?
View is a virtual table with no data , but can be operated like any other table. It is like a virtual table through which you can view data of another table, which is known as the base table. Syntax for creating a view- CREATE VIEW as SELECT statement ;
How many types of view in oracle?
There are two types of views in Oracle based upon from how many tables data are being fetched. 1. Simple view - In this view, data is coming from only one table. 2. Complex view - In this view, data comes from more than one table. That's it. However, Complex views have some limitations. For these follow Oracle documentation.
What are the functional views of the computer?
Data movement, apparatus control, and data processing are the three main functional views of the computer. Also, mechanism data is another functional view of the computer.
