Classic ASP + SQL

UPDATE [artists] SET strTechnics = strTechnics + '2' WHERE intID = 283;

Web development, but still SQL.
Is it possible to write the plus sign like that!? For some reason, it’s a black out in my head!

try either the CONCAT function or the || operator instead

I think the CONCAT has the different purpose, at least what is shown on this manual, in this example.
The vertical bars || was generating an error.
It’s a number, yes, but it’s a string.

Behind the scene, it’s Classic ASP and Access as the DB.
I look further or think of something else!
Thank you for input CONCAT is new for me!

UPDATE [artists] SET strTechnics = strTechnics & ' 3' WHERE intID = 283;