Asked by: Yoanka Mendo
technology and computing databases

What is the view of a database?

28
A database view is a searchable object in adatabase that is defined by a query. Though a viewdoesn't store data, some refer to a views as “virtualtables,” you can query a view like you can a table. Aview can combine data from two or more table, using joins,and also just contain a subset of information.


Likewise, people ask, how is view stored in database?

A view is a virtual table that consists ofcolumns from one or more tables. Though it is similar to a table,it is stored in the database. It is a querystored as an object. Complex queries can be stored inthe form as a view, and data from the view can beextracted using simple queries.

Also Know, what is view and its types? There are 2 types of Views in SQL: SimpleView and Complex View. Simple views can only containa single base table. Complex views can be constructed on more thanone base table. In particular, complex views can contain: joinconditions, a group by clause, a order by clause.

Additionally, what is a SQL view and what is it used for?

View can be described as virtual table whichderived its data from one or more than one table columns. It isstored in the database. View can be created using tables ofsame database or different database. It is used to implementthe security mechanism in the SQL Server.

What is the role of views in DBMS?

View (SQL) In a database, a view isthe result set of a stored query on the data, which the databaseusers can query just as they would in a persistent databasecollection object. Views can provide advantages over tables:Views can represent a subset of the data contained in atable.

Related Question Answers

Boyan Florensa

Professional

Can we insert data into view?

If you are using inner joins, and your viewcontains all the columns in the base tables, then yourview might be updatable. However, for a multiple-tableupdatable view, INSERT can work if it insertsinto a single table. You could split your insertoperation into multiple INSERTstatements.

Vitalija Junquera

Professional

Can we create index on view?

Views allow you to create a virtual table bydefining a query against one or more tables. With a standardview, the result is not stored in the database. Instead, theresult set is determined at the time a query utilizing thatview is executed. Creating a unique clusteredindex on a view changes it to an indexedview.

James Ocampos

Professional

What is database user view?

A database view is a searchable object in adatabase that is defined by a query. Though a viewdoesn't store data, some refer to a views as “virtualtables,” you can query a view like you can a table. Aview can combine data from two or more table, using joins,and also just contain a subset of information.

Simeon Floristan

Explainer

Does SQL View improve performance?

Views make queries faster to write, but theydon't improve the underlying query performance. Inshort, if an indexed view can satisfy a query, then undercertain circumstances, this can drastically reduce theamount of work that SQL Server needs to do to returnthe required data, and so improve queryperformance.

Hamudi Getta

Explainer

Does View store data in SQL?

It does not hold the actual data;it holds only the definition of the view in the datadictionary. The view is a query stored in thedata dictionary, on which the user can query justlike they do on tables. It does not use the physicalmemory, only the query is stored in the datadictionary.

Enache Lenck

Explainer

Does View contain data?

does view contain data. The answer depends on thetype of view. In case of normal view, the answer isNO it only contains query based on a base table but in caseof materialized view, YES it does contain data andfor the updated data in the base table, it needs to berefreshed.

Lyla Esquiroz

Pundit

What is difference between views and tables?

A view consists of rows and columns just like atable. The difference between a view and atable is that views are definitions built on top ofother tables (or views), and do not hold datathemselves. Space savings: Views takes very little space tostore, since they do not store actual data.

Nasrallah Vormfelde

Pundit

Do views occupy memory?

A view acts as a virtual table. However, somedatabases support another approach as well: materialisedviews. With these, the view's query is executed aheadof time, and the results are stored on disk. Materialised viewsviews do indeed occupy physical space in proportion tothe number of rows they contain.

Kim Pimenta

Pundit

What is view explain with example?

Views in SQL are kind of virtual tables. Aview also has rows and columns as they are in a real tablein the database. We can create a view by selecting fieldsfrom one or more tables present in the database. A View caneither have all the rows of a table or specific rows based oncertain condition.

Hyun Rohwedder

Pundit

What is the advantage of view in SQL?

Advantages of database view
You can use database view to hide the complexityof underlying tables to the end-users and external applications.Through a database view, you only have to use simpleSQL statements instead of complex ones with many joins. Adatabase view helps limit data access to specificusers.

Anai Eyett

Pundit

Why do we use views instead of tables?

Views can provide many advantages overtables:
Views can represent a subset of the datacontained in a table. Views can limit the degree ofexposure of the underlying tables to the outer world: agiven user may have permission to query the view, whiledenied access to the rest of the basetable.

Daysi Jagich

Teacher

What is the difference between view and stored procedure?

A SQL View is a virtual table, which is based onSQL SELECT query. View is simple showcasing data storedin the database tables whereas a stored procedure is agroup of statements that can be executed. A view is fasteras it displays data from the tables referenced whereas a storeprocedure executes sql statements.

Mariyka De Oleo

Teacher

How do I view a SQL database?

Using SQL Server Management Studio
  1. In Object Explorer, connect to an instance of the SQL ServerDatabase Engine, and then expand that instance.
  2. Expand Databases, right-click the database to view, and thenclick Properties.
  3. In the Database Properties dialog box, select a page to viewthe corresponding information.

Achiuta Jahno

Teacher

What is a MySQL view?

In SQL, a view is a virtual table based on theresult-set of an SQL statement. A view contains rows andcolumns, just like a real table. The fields in a view arefields from one or more real tables in the database.

Edier Martynov

Teacher

How do stored procedures work?

A stored procedure is typically treated likeother database objects and controlled through server securitymechanism. In a DBMS, a stored procedure is a set of SQLstatements with an assigned name that's stored in thedatabase in compiled form so that it can be shared by a number ofprograms.

Saraima Noales

Reviewer

What view means?

A view is a subset of a database that isgenerated from a query and stored as a permanent object. Althoughthe definition of a view is permanent, the datacontained therein is dynamic depending on the point in time atwhich the view is accessed. Views represent a subsetof the data contained in a table.

Juaquin Bresselschmitt

Reviewer

What is the trigger?

In a DBMS, a trigger is a SQL procedure thatinitiates an action (i.e., fires an action) when an event (INSERT,DELETE or UPDATE) occurs. Since triggers are event-drivenspecialized procedures, they are stored in and managed by theDBMS.

Harjit Kreitmair

Reviewer

What do you mean by view?

In a database management system, a view is a wayof portraying information in the database. This can be done byarranging the data items in a specific order, by highlightingcertain items, or by showing only certain items. For any database,there are a number of possible views that may bespecified.

Jianmin Calbo

Reviewer

Can we update view?

Restrictions on Updating Data ThroughViews. If the view contains joins between multipletables, you can only insert and update one table inthe view, and you can't delete rows. You can'tdirectly modify data in views based on union queries. Youcan't modify data in views that use GROUP BY orDISTINCT statements.

Co-Authored By:

EveryThingWhat Staff Editor

12

31st May, 2020

51

92% of readers found this page helpful.

4.7/5

Click a star to add your vote

Similar Asks
Trending