select ‘‘ || varid || ‘‘ as varlink …

Also, there is a more sophisticated quoting mechanism which allows you to use single-quotes inside your quoted string without having to “double them up”:

select ‘abc”def’ the_old_way, q’#abc’def#’ the_new_way, q”abc’def” an_alternative_way
from dual

The leading ‘q’ character is mandatory as are the outer single-quotes. However, you have a wide range of choices for the inner character – I have shown it above with a hash character or a second single quote character but you could also use open and close brackets etc. Is this what you mean by magic quotes?

You can use this wherever a string literal is allowed so your above query could become:

select q”” || varid || q”” as varlink …