subselect

sub- +‎ select

subselect (third-person singular simple present subselects, present participle subselecting, simple past and past participle subselected)

1. (transitive) To select (part of a larger selection).
   • 2009, Mark H. Walker, Nanette Eaton, Microsoft® Office Visio® 2003 Inside Out:

     The ready-made title block shapes are actually groups. When you click a title block, the entire group is selected; then, you can click an individual shape to subselect it.

subselect (plural subselects)

1. (databases) A select query inside another select query.