Encrypted View: (References from site)
The definition of schema will be encrypted and stored as object in the database. This can be done using the ENCRYPTION option in the view creation.

IF OBJECT_ID('[DBO].Vw_SqlObjects_Encrypted') IS NOT NULLBEGIN   DROP VIEW [DBO].Vw_SqlObjects_Encrypted
   PRINT '<< [DBO].Vw_SqlObjects_Encrypted View dropped >>'ENDGO
CREATE VIEW [DBO].Vw_SqlObjects_Encrypted
WITH ENCRYPTION
AS   SELECT       O.Object_ID      ,O.Name
      ,'Type' = CASE O.type WHEN 'S' THEN 'Scalar Functions'                          WHEN 'F' THEN 'Functions'                          WHEN 'V' THEN 'Views'                          WHEN 'PK' THEN 'Primary keys'                          WHEN 'TR' THEN 'Triggers'                          WHEN 'P' THEN 'Procedures'                          WHEN 'U' THEN 'User Defined Functions'                          WHEN 'TF' THEN 'Table Valued Functions'                          WHEN 'IF' THEN 'Inline Functions' END      ,O.create_date
      ,O.modify_date
      ,CASE WHEN SC.encrypted = 0 THEN 'No' ELSE 'Yes' END AS [IsEncrypted]
      ,SC.text
  FROM      SYS.OBJECTS O
  INNER JOIN      SYSCOMMENTS SC ON SC.id = O.object_id
 GO
IF OBJECT_ID('[DBO].Vw_SqlObjects_Encrypted') IS NOT NULLBEGIN   PRINT '<< [DBO].Vw_SqlObjects_Encrypted View created >>'ENDGO
Now if you want to see the view schema definition for the above view is not possible. We have stored in the encrypted format. This is a significant option to hide the important calculations inside the view from the others.

In case of any alter in the view must be stored externally somewhere else.

SELECT text FROM SYSCOMMENTS WHERE id = OBJECT_ID('[DBO].Vw_SqlObjects_Encrypted')

SELECT definition FROM SYS.sql_modules WHERE object_id = OBJECT_ID('[DBO].Vw_SqlObjects_Encrypted')

sp_helptext Vw_SqlObjects_Encrypted
If you execute the above queries then it will say like view is encrypted.

There are three types of views in the sql server 2005.

They are 

Normal or Standard view:
This view is most frequently used by the developers. When create the view the schema will be stored an object in the database. When we retrieve the content from this virtual table, it will be executed the schema and stored the data from the parent table.

Here if you have the result from the same table then it can be updated and inserted. The deleted row will be reflected in the original table.

USE [Northwind]
GO
IF OBJECT_ID('[DBO].vw_ViewProducts','V') IS NOT NULLBEGIN  DROP VIEW [DBO].vw_ViewProducts
  PRINT '<< [DBO].vw_ViewProducts view dropped.. >>'ENDGO
CREATE VIEW [DBO].vw_ViewProducts
AS SELECT
    ProductID,ProductName,SupplierID,CategoryID,QuantityPerUnit,UnitPrice,UnitsInStock,UnitsOnOrder,ReorderLevel,Discontinued
 FROM Products
GO
IF OBJECT_ID('[DBO].vw_ViewProducts','V') IS NOT NULLBEGIN  PRINT '<< [DBO].vw_ViewProducts view created.. >>'ENDGO
--O/PSELECT * FROM [DBO].vw_ViewProducts
--INSERTINSERT INTO [DBO].vw_ViewProducts(ProductName,SupplierID,CategoryID,QuantityPerUnit,UnitPrice,UnitsInStock,UnitsOnOrder,ReorderLevel,Discontinued)VALUES('Test View',1,2,'100 per bag',25.45,89,57,15,0)--DELETEDELETE FROM [DBO].vw_ViewProducts WHERE ProductID = 81
Here you can do the DML operations in the view when you have only one table.

Indexed views:
The indexed or permanent view is one of the new features introduced in the sql server 2005 version. We have seen that the view only store the schema definition and it will get execute and load the data into the virtual table at the time of view used. But this view creates the permanent view and we can create the indexes on the table. It allows us to create the instead of trigger.

The indexed view can be created with the WITH SCHEMA BINDING option while creating the view.

The indexed view has some restrictions like cannot use the TOP, DISTINCT, UNION, ORDER BY and aggregate functions.

It allows us to use the GROUP BY statement but we cannot use COUNT statement. Instead of that COUNT_BIG statement can be used.

IF EXISTS(SELECT OBJECT_ID FROM SYS.OBJECTS WHERE OBJECT_ID = OBJECT_ID(N'[DBO].Vw_Product_Sales_Report',N'V'))BEGIN  DROP VIEW [DBO].Vw_Product_Sales_Report
  PRINT '<< [DBO].Vw_Product_Sales_Report view dropped >>'ENDGO
CREATE VIEW [DBO].Vw_Product_Sales_Report
WITH SCHEMABINDING
AS  SELECT
      O.OrderID
     ,C.CustomerID
     ,C.CompanyName
     ,C.Address+', '+C.City AS [Customer Address]
     ,OD.ProductID
     ,P.ProductName
     ,OD.UnitPrice
     ,OD.Quantity
     ,(OD.UnitPrice * OD.Quantity) AS [Total]
     ,(OD.UnitPrice * OD.Quantity) * OD.Discount/100 AS [Discount]
   FROM     [DBO].Orders O (NOLOCK)   INNER JOIN [DBO]."Order Details" OD (NOLOCK) ON OD.OrderID = O.OrderID
   INNER JOIN [DBO].Customers C (NOLOCK) ON C.CustomerID = O.CustomerID
   INNER JOIN [DBO].Products P (NOLOCK) ON P.ProductID = OD.ProductID
GO
IF EXISTS(SELECT OBJECT_ID FROM SYS.OBJECTS WHERE OBJECT_ID = OBJECT_ID(N'[DBO].Vw_Product_Sales_Report',N'V'))BEGIN  PRINT '<< [DBO].Vw_Product_Sales_Report view created >>'ENDGO
Here the  indexed view has created. When you retrieve the data from this table, it will execute like normal table.

There are some retrictions while creating this indexed view like the name of the view must be two part name and we cannot use select * in the view schema defintion.

Normally view cannot have the triggers but from the sql server 2005 onwards We can create the Instead of trigger on the instead of trigger.

Partitioned Views:
The partitioned view and its execution is like normal view. It will work across the database and across the server.

There are two types of Partitioned views. They are 

1. Local Partitioned View:
The local partitioned view can be created within same server but different database.

The view schema definition will be stored in the executed database. But when we try to retrieve the data from the table, it has to execute the schema definition internally and load the data.

Let us see an example.

USE [Northwind]
GO
CREATE TABLE EmployeeList
(  iEmployeeID INT IDENTITY(1,1),  vFirstName VARCHAR(25) NOT NULL,  vLastName VARCHAR(25) NOT NULL,  iDeptID INT,  vAddress VARCHAR(25) NOT NULL,  vCity VARCHAR(25) NOT NULL,  vState VARCHAR(25) NOT NULL,  vCountry VARCHAR(25) NOT NULL,
)GO
USE [Master]
GO
CREATE TABLE Department
(  iDeptID INT IDENTITY(1,1) PRIMARY KEY,  vDeptName VARCHAR(50),  vDeptDesc VARCHAR(25),  vDeptAddedBy VARCHAR(50),  vPostedDate DATETIME DEFAULT GETDATE()
)GO
--SELECT * FROM DepartmentUSE [Northwind]
GO
IF OBJECT_ID('[DBO].vw_LocalPartion_View','V') IS NOT NULLBEGIN  DROP VIEW [DBO].vw_LocalPartion_View
  PRINT '[DBO].vw_LocalPartion_View view dropped...'ENDGO
CREATE VIEW [DBO].vw_LocalPartion_View
AS
SELECT E.iEmployeeID,E.vFirstName+SPACE(1)+E.vLastName AS [Name],       D.vDeptName,E.vAddress,E.vCity,E.vState
FROM EmployeeList E
--INNER JOIN Master..Department D ON D.iDeptID = E.iDeptID --Either one of the way will be used.INNER JOIN Master.dbo.Department D ON D.iDeptID = E.iDeptID
GO
IF OBJECT_ID('[DBO].vw_LocalPartion_View','V') IS NOT NULLBEGIN  PRINT '[DBO].vw_LocalPartion_View view created...'ENDGO
--O/pSELECT * FROM [DBO].vw_LocalPartion_View

2. Global Partitioned View
The global Partitioned view will work across the server. The view can be created to join the table across the server.

The accessing format will be like this.

[Server Name].  Database Name. Table Name

When we execute the view if it is not linked with the current server then it will ask us to link the external server.

The following system stored procedure will be used to link the server.

sp_addlinkedserver 'Server name'
The following system catalog table is used to see the list of linked servers.
SELECT * FROM SYS.SERVERS
INSTEAD OF Triggers on the Indexed View
Normally the triggers cannot be created on the view. But sql server 2005 onwards we can create the INSTEAD OF trigger on the indexed views.
USE [Northwind]
GO
IF OBJECT_ID('[DBO].[VW_Trigger_Example') IS NOT NULLBEGIN   DROP VIEW [DBO].[VW_Trigger_Example]
   PRINT '[DBO].[VW_Trigger_Example view dropped..'ENDGO
CREATE VIEW [DBO].[VW_Trigger_Example]
WITH SCHEMABINDING
AS  SELECT P.ProductID,P.ProductName,P.SupplierID,         OD.OrderID,OD.UnitPrice,OD.Quantity
  FROM [DBO].Products P
  INNER JOIN [DBO].[Order Details] OD ON OD.ProductID = P.ProductID
GO
IF OBJECT_ID('[DBO].[VW_Trigger_Example') IS NOT NULLBEGIN   PRINT '[DBO].[VW_Trigger_Example view created..'ENDGO
--SELECT * FROM VW_Trigger_ExampleIF OBJECT_ID('[DBO].Tr_Delete_TriggerExample','TR') IS NOT NULLBEGIN  DROP TRIGGER [DBO].Tr_Delete_TriggerExample
  PRINT '[DBO].Tr_Delete_TriggerExample trigger dropped..'ENDGO
CREATE TRIGGER [DBO].Tr_Delete_TriggerExample
ON [DBO].VW_Trigger_Example
INSTEAD OF DELETE
AS
BEGIN   PRINT '----------------------------------------'   PRINT 'This is an example of INSTEAD OF Trigger'   PRINT '----------------------------------------'   SELECT TOP 1 * FROM DELETED
ENDGO
IF OBJECT_ID('[DBO].Tr_Delete_TriggerExample','TR') IS NOT NULLBEGIN  PRINT '[DBO].Tr_Delete_TriggerExample trigger created..'ENDGO
--O/P
--SELECT * FROM [DBO].[VW_Trigger_Example] WHERE ProductID = 11DELETE FROM [DBO].[VW_Trigger_Example] WHERE ProductID=11