Searching for all tickets that have children

Hi all,

I want to search for all tickets which, amongst other criteria, are
depended on by at least one other ticket. I played around with
DependedOnBy and various special char like blank, *, & etc, but could
not find any ‘this matches all’ glob. Is there any such thing and, if
not, what is the correct way to look for ‘All tickets which have at
least one child which said ticket depends on’?