title: Creating a computed column in SQL Server 2008
body: <p>I have a SQL Server 2008 database. This database has a Table called "Book". "Book" has the following properties:</p>
  
  <ul>
  <li>ID (int)</li>
  <li>Title (nvarchar(256))</li>
  <li>PublishDate (datetime)</li>
  </ul>
  
  <p>I need to create a computed column called "AgeInMinutes". I'm not very familiar with computed columns. I understand the concept, but I'm not sure how to do it. In SQL Server Management studio, in the "Column Properties" area, I see a property called "(Formula)" in the Table Designer section. I assume I need to enter my calculation here. However, I'm not sure what to put here. Can somebody please help me?</p>
  
  <p>Thank you!</p>