Views in SQL Server

In this study, we explain to you how to create View in SQL, modify, rename, and delete Views in SQL Server. The SQL Views are the virtual tables, which consist of columns, rows from the referenced table. Unless we defined indexed views, a view in SQL Server does not store a set of values in a database. When you use the SELECT Statement against a SQL view, then the records will come from the table that we referenced while creating a view.

Create View in SQL Server

You can use Transact-SQL Query or SQL Management Studio to create views in SQL Server. Before we get into the example, You can use a Sql Server View for the following purposes:

• To simplify the data as per the user needs.
• Restrict the Users not to access the entire database.

Create View in SQL Server Management Studio

This example shows the steps involved to create View in SQL Server using the Management Studio. The restrictions to remember while creating views are

• A View can be created only in the current database
• The view allows us to have a maximum of 1024 columns

To see the existing Sql Server Views, Please select the Database that has the views. As you see, our database has no views.

Right-click on the Views folder in Management Studio will open the context menu. To create a view in SQL Server, Please select the New View..option from it.

Once you click on the New View… option, the Query Designer opens in a separate window, and a Pop-up window to add the required tables.

Here, you can add functions, tables, or views. From the below, you can observe that we selected the MyEmployees table and Department table.

Once you selected the required tables, it will show the Query Designer. Please choose the columns needed by check-marking the column names in the Diagram Pane.

In this SQL Server example, we chose the First Name, Last Name, Education, Occupation, Department, Yearly Income, Sales, Hire Date from two tables. Remember, you can Join two tables by dragging one column on to the other.

The sort Type property is used to apply for ORDER BY functionality. Within the Grid Pane, Please change the Sort Type to Ascending or Descending. In this SQL Server views example, we are sorting Yearly Income in the Descending Order.

Once you selected the Descending Operation, it will show you the sorting representation

The final select query that we designed

Let us execute this Sql Server views query that we designed using the Management Studio and see the result

-- SQL View Example
SELECT  TOP (100) PERCENT dbo.[MyEmployees Table].FirstName, 
        dbo.[MyEmployees Table].LastName, 
        dbo.[MyEmployees Table].Education, 
        dbo.[MyEmployees Table].Occupation, 
        dbo.Department.DepartmentName, 
        dbo.[MyEmployees Table].YearlyIncome, 
        dbo.[MyEmployees Table].Sales, 
        dbo.[MyEmployees Table].HireDate
FROM dbo.Department
 INNER JOIN
     dbo.[MyEmployees Table] ON 
         dbo.Department.id = dbo.[MyEmployees Table].DeptID
ORDER BY dbo.[MyEmployees Table].YearlyIncome DESC

Next, go to File Menu and select the Save option to save the designed View.

It will open the popup window called Choose Name to change the default name.

Expand the View folder, see the View that we created, and expand it to see the Column names.

NOTE: Some clients give access to Views only, and they will not allow you to access their main database.

SQL View using Create View Statement

This SQL Server view example shows how to create a View in SQL Server using the Create View Statement

-- SQL View Example 
USE [SQL Tutorial]
GO
CREATE VIEW EmployeesViewbyQuery
AS
SELECT  [FirstName] + ' ' + [LastName] AS Name
	,[Occupation]
	,[Education]
	,dept.DepartmentName AS Department
	,[YearlyIncome] AS Income
	,[Sales]
FROM [MyEmployees Table]
   INNER JOIN 
 	 Department AS dept ON
	    Dept.[id] = [MyEmployees Table].DeptID
GO

Let us see the Output

-- SQL View Example
USE [SQL Tutorial]
GO
SELECT * FROM [dbo].[EmployeesViewbyQuery]

Rename Views in SQL Server

The SQL Server allows you to use the built-in stored procedure sp_rename, or the management studio to rename views in SQL Server.

Rename SQL View in SQL Management Studio

This example rename the View using SSMS. And to rename the SQL View using SSMS, Please navigate to the View that you want to modify (EmployeesViewbySSMS). And right-click on the view and select the Rename option

Once you click on the Rename option, SSMS allows us to rename views.

Rename SQL View using SP_RENAME

We can use the sp_rename stored procedure to rename the view. The sp_rename syntax for views is:

SP_RENAME View_Old_Name, View_New_Name

Using the sp_rename stored procedure, you can rename the existing view. To do so, Click New query and return the following query.

-- Rename SQL View
USE [SQL Tutorial]
GO
SP_RENAME EmployeesViewbyStudio, EmployeesViewbySQLSMS

Modify Views in SQL Server

The following examples help you understand the steps involved in modifying the SQL Views. First, let us see the limitations or restrictions to follow:

• Dependency Objects such as triggers or stored procedures will not affect by modifying a view.
• You can use the ALTER VIEW statement on indexed views because ALTER VIEW will unconditionally drop all the indexes on the views.

Modify Views using SSMS

To modify Views in Sql Server Management Studio, navigate to the view that you want to change (EmployeeViewbySQLSMS). Next, right-click on it and select the Design option

It opens a new design query window with existing tables, along with the relationship.

Here, we are using the Filter (WHERE Clause) to restrict the Employees whose Occupation = Professional, and we are using two columns in ORDER BY Clause

Let me select all the records from the EmployeeViewbySQLSMS to show the modified records.

-- Modified SQL View
USE [SQL Tutorial]
GO

SELECT [FirstName]
      ,[LastName]
      ,[Education]
      ,[Occupation]
      ,[DepartmentName]
      ,[YearlyIncome]
      ,[Sales]
      ,[HireDate]
  FROM [dbo].[EmployeesViewbySQLSMS]
GO

Alter View to Modify Views in SQL Server

The SQL Server ALTER VIEW statement is an ideal approach to modify the existing view. To do so, click the new query and write the subsequent query.

-- Modified SQL View
USE [SQL Tutorial]
GO

ALTER VIEW [dbo].[EmployeesViewbySQLSMS]
AS
SELECT TOP 10 emp.FirstName, 
          emp.LastName, 
   emp.Education, 
   emp.Occupation, 
   Dept.DepartmentName, 
          emp.YearlyIncome, 
   emp.Sales
FROM  dbo.Department AS Dept
   INNER JOIN
      dbo.[MyEmployees Table] AS emp ON 
        Dept.id = emp.DeptID
ORDER BY emp.YearlyIncome DESC, 
         emp.Sales DESC
GO

Let us see the Output

-- Modified SQL View
SELECT [FirstName]
      ,[LastName]
      ,[Education]
      ,[Occupation]
      ,[DepartmentName]
      ,[YearlyIncome]
      ,[Sales]
  FROM [SQL Tutorial].[dbo].[EmployeesViewbySQLSMS]

Find definition Of a Views

How to use the sp_helptext stored procedure to get the definition of any view?.

-- SQL View Definition
USE [SQL Tutorial]
GO
SP_HELPTEXT [EmployeesViewbyQuery]

Delete Views in SQL Server

The following examples show how to delete Views.

• Deleting, or Dropping a Table will not drop the dependent View. You have to explicitly use the DROP VIEW statement to delete Views in SQL Server.
• When you drop a view, all the view information (including the definition) will delete from the system catalog.

Delete Views in Management Studio

To delete a view using the Management Studio, right-click on the view name and click on the Delete option. For this views demonstration, we want to delete EmployeesViewbySQLSMS

Selecting the delete option will open a Delete Object window. Click on the Show Dependencies button to check the dependencies, and then click OK to delete the view.

Delete Views or Drop View

Let me use the DROP VIEW statement to delete a SQL View.

-- Delete SQL View 
USE [SQL Tutorial]
GO

DROP VIEW [dbo].[EmployeesViewbyQuery]
GO

TIP: It is good practice to check whether the view exists in the database or not using IF OBJECT_ID (N’View_Name’, ‘V’) IS NOT NULL