How Is View Created And Dropped In Dbms?


Database views are created using the CREATE VIEW statement. Views can be created from a single table, multiple tables or another view. To create a view, a user must have the appropriate system privilege according to the specific implementation. CREATE VIEW view_name AS SELECT column1, column2..



What is view explain?

A view is a subset of a database that is generated from a user query and gets stored as a permanent object. In a structured query language (SQL) database, for example, a view becomes a type of virtual table with filtered rows and columns that mimic those of the original database.


What is view explain types of view?

A View contains no data of its own but its like window through which data from tables can be viewed or changed. The table on which a View is based are called BASE Tables. There are 2 types of Views in SQL: Simple View and Complex View. Simple views can only contain a single base table.


What is MySQL view Mcq?

Explanation: In MySQL, a 'View' is used to present a table in the database. It is a virtual table. It is also used to present a subset of the columns that are present in the original table of the database. 3.


What is view table?

A view is a virtual table. A view consists of rows and columns just like a table. The difference between a view and a table is that views are definitions built on top of other tables (or views), and do not hold data themselves. If data is changing in the underlying table, the same change is reflected in the view.


What are the uses of views Mcq?

Explanation: Views are a valuable tool for the SQL Server Developer because they hide complexity and allow for a readable style of SQL expression.


What type of word is view?

View is a general word, referring to whatever lies open to sight: a fine view of the surrounding country.


What is a view Mcq DBMS?

A view is a virtual table which results of executing a pre-compiled query. A view is not part of the physical database schema, while the regular tables are. C.


What is Lastknownlocation in Android?

Using the Google Play services location APIs, your app can request the last known location of the user's device. In most cases, you are interested in the user's current location, which is usually equivalent to the last known location of the device.


What is view view create?

A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. You can add SQL statements and functions to a view and present the data as if the data were coming from one single table. A view is created with the CREATE VIEW statement.


How many types of views are there?

Answer. 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,.


What is an adapter view?

AdapterView is a special kind of view specifically designed to render a collection of similar information like product list and user contacts fetched from an underlying data source using Adapter. The data source may be simple list to complex database entries.


What is the closest definition of a view?

1 : extent or range of vision : sight tried to keep the ship in view sat high in the bleachers to get a good view. 2 : the act of seeing or examining : inspection also : survey a view of English literature. 3a : a mode or manner of looking at or regarding something.


What is a view mechanism?

The represent- ation of the data structure as seen by a user is often referred to as an external schema; the view mechanism is a means by which a DBMS can support various external schemas.


What is an advantage of view Mcq?

A view can draw data from several different tables and present it as a single table, turning multi-table queries into single-table queries against the view.


How is view created and dropped in DBMS?

Database views are created using the CREATE VIEW statement. Views can be created from a single table, multiple tables or another view. To create a view, a user must have the appropriate system privilege according to the specific implementation. CREATE VIEW view_name AS SELECT column1, column2..


What is an Android view group?

ViewGroup is a collection of Views(TextView, EditText, ListView, etc..), somewhat like a container. A View object is a component of the user interface (UI) like a button or a text box, and it's also called a widget.


What is a view in DBMS?

Views in SQL are considered as a virtual table. A view also contains rows and columns. To create the view, we can select the fields from one or more tables present in the database. A view can either have specific rows based on certain condition or all the rows of a table.


What is view in Mcq Android?

Explanation: View is the basic building block of UI(User Interface) in android. View refers to the android.view.View class, which is the super class for all the GUI components.


Dated : 22-May-2022

Category : Education

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