Database Function VS Case Statement

Question

Yesterday we got a scenario where had to get type of a db field and on base of that we had to write the description of the field. Like

Select ( Cas         


        

Answer 1

Your devolper is right. Functions will slow down your query.

https://sqlserverfast.com/?s=user+defined+ugly

Calling functionsis like:
wrap parts into paper
put it into a bag
carry it to the mechanics
let him unwrap, do something, wrapt then result
carry it back
use it