Javatpoint Logo
Javatpoint Logo

Views in SQL

  • 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.

Sample table:

Student_Detail

STU_ID NAME ADDRESS
1 Stephan Delhi
2 Kathrin Noida
3 David Ghaziabad
4 Alina Gurugram

Student_Marks

STU_ID NAME MARKS AGE
1 Stephan 97 19
2 Kathrin 86 21
3 David 74 18
4 Alina 90 20
5 John 96 18

1. Creating view

A view can be created using the CREATE VIEW statement. We can create a view from a single table or multiple tables.

Syntax:

2. Creating View from a single table

In this example, we create a View named DetailsView from the table Student_Detail.

Query:

Just like table query, we can query the view to view the data.

Output:

NAME ADDRESS
Stephan Delhi
Kathrin Noida
David Ghaziabad

3. Creating View from multiple tables

View from multiple tables can be created by simply include multiple tables in the SELECT statement.

In the given example, a view is created named MarksView from two tables Student_Detail and Student_Marks.

Query:

To display data of View MarksView:

NAME ADDRESS MARKS
Stephan Delhi 97
Kathrin Noida 86
David Ghaziabad 74
Alina Gurugram 90

4. Deleting View

A view can be deleted using the Drop View statement.

Syntax

Example:

If we want to delete the View MarksView, we can do this as:


Next TopicDBMS SQL Index




Please Share

facebook twitter google plus pinterest

Learn Latest Tutorials


Preparation


Trending Technologies


B.Tech / MCA