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, 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 Management Studio to create or replace views. 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.
SQL Create View Statement
This example shows how to create View in SQL Server using the Create Statement
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 rows and columns result set
SELECT * FROM [dbo].[EmployeesViewbyQuery]
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 are
- It can be created only in the current database
- It allows us to have a maximum of 1024 columns
To see the existing Sql Server Views, Please select the Database that has it. As you see, our database has none.
Right-click on the folder in Management Studio will open the context menu. To create it, Please select the shown option from it.
Once you click on the 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 views query that we designed using the Management Studio and see the result
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 query.
It will open the popup window called Choose Name to change the default name.
Expand the folder, see the one 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.
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 in SQL Management Studio
This example rename them using SSMS. And to rename it, Please navigate to the one that you want to modify (EmployeesViewbySSMS). And right-click on the name and select the Rename option
Once you click on the Rename option, SSMS allows us to rename them.
Rename SQL View using SP_RENAME
We can use the sp_rename stored procedure to rename the view. The sp_rename syntax is:
SP_RENAME View_Old_Name, View_New_Name
Using the sp_rename stored procedure, you can rename the existing. To do so, Click New query and return the following query.
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.
- You can use the ALTER VIEW statement on indexed ones because it will unconditionally drop all the indexes.
Modify in SSMS
To modify in Management Studio, navigate to the one 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.
Let me select all the records from the EmployeeViewbySQLSMS to show the modified records.
SELECT [FirstName] ,[LastName] ,[Education] ,[Occupation] ,[DepartmentName] ,[YearlyIncome] ,[Sales] ,[HireDate] FROM [dbo].[EmployeesViewbySQLSMS]
Alter View to Modify
The SQL Server ALTER VIEW statement is an ideal approach to modify the existing ones. To do so, click the new query and write the subsequent query.
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
Let us see the Output
SELECT [FirstName] ,[LastName] ,[Education] ,[Occupation] ,[DepartmentName] ,[YearlyIncome] ,[Sales] FROM [EmployeesViewbySQLSMS]
How to find definition Of the Views?
How to use the sp_helptext stored procedure to get the definition.
Delete Views in SQL Server
The following examples show how to delete it.
- Deleting, or Dropping a Table will not drop the dependent View. You have to explicitly use the SQL Server DROP VIEW statement to delete them.
- When you drop it, all the information (including the definition) will delete from the system catalog.
To delete using the Management Studio, right-click on the name and click on the Delete option. For this 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.
Delete or Drop Views
Let me use the DROP statement to delete.
DROP VIEW [dbo].[EmployeesViewbyQuery] GO
TIP: It is good practice to check whether it exists in the database or not using IF OBJECT_ID (N’View_Name’, ‘V’) IS NOT NULL