XF 2.1 One column with finder->fetch?

[tom3]

Is it possible to output only one column for several entries with the fetch() method?
I need to fetch a lot of data from one of my entities and for efficiency reasons I only need to get one column. Is this possible with the Finder?

 

[TickTackk]

->fetch(['user_id'])

 

[tom3]

Thanks!