Why is a UDF so much slower than a subquery?

Question

I have a case where I need to translate (lookup) several values from the same table. The first way I wrote it, was using subqueries:

SELECT
    (SELECT id FRO         


        

Answer 1

Am I missing something? Why can't this work? You are only selecting the id which you already have in the table:

select created_by as creator, updated_by as updater, 
owned_by as owner, [name]
from asset

By the way, in designing you really should avoid keywords, like name, as field names.