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By Andrew Gould
[ Ссылка ] - If you have a calculation that you frequently use in SQL queries you're probably bored of writing out the same code time after time. Why not try creating a user-defined function to save you the hassle! This video teaches you how to define your own custom functions, including how to use input parameters, how to alter a function after you've created it, and even how to use fancy programming techniques such as variables and IF statements to help structure complex sequences of calculations.
A written version of this tutorial with more function examples can be found here:
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You can download the script to create the Movies database used in this video at the following link:
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You can see the range of resources and courses we offer in SQL Server here:
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