Creating a computed column in SQL Server 2008

Question

I have a SQL Server 2008 database. This database has a Table called \"Book\". \"Book\" has the following properties:

• ID (int)
• Title (nvarchar(256))

Answer 1

You can define the column in your CREATE TABLE as:

AgeInMinutes as (DATEDIFF(minute, PublishDate, GETDATE())

Alternatively, just do

ALTER TABLE Book
ADD AgeInMinutes as (DATEDIFF(minute, PublishDate, GETDATE())

Answer 2

Modify computed column through SSMS. Right click on table and select Design then click on computed column then see in column properties there is one option like. Computed column specification there you can alter COMPUTED COLUMN.