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Posted by Andrew Gould on 10 November 2016
A computed column in a SQL Server table allows you to store an expression which calculates a new value based on the data in other columns of the same table. This video explains how to create computed columns and how to persist the result of the calculation so that it's stored in the table. You'll also learn a little about SQL Server's expression syntax, including how to use some of its built-in functions, the difference between deterministic and non-deterministic functions, how to use Case expressions to test conditions and how to concatenate strings. We'll do this by building a few example computed columns including constructing a full name from first and last name columns, calculating age in days using the DateDiff function and calculating age in years using DateDiff, DateAdd and a Case expression.
This video has the following accompanying files:
|End - CreatePeople.sql||SQL query|
Click to download a zipped copy of the above files.
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