O'Reilly logo
  • Dustin Waybright thinks this is interesting:

Computed Columns

You can also define columns as values that are computed based on expressions. These expressions could be based on the value of other columns in the row or based on T-SQL functions.

From

Cover of Training Kit (Exam 70-461): Querying Microsoft® SQL Server® 2012

Note

For example, using a CASE expression or multiplying together 2 numeric columns for an item total in retail sales data.