A very dumb question related to X++ conditional select where statement

Hi guys,

I was wondering is there anyway Dynamics 365 (Current AX) could accept a code like below.

I have already tried it inside a runnable test class, but IDE gave me errors even before I could run it, due to syntax error.

Is there anyway to produce something like below, in a smart way instead of repeating the whole select statement just to find another record inside a table?