On Thursday, June 2, 2016, Steve Clark <steve.cl...@netwolves.com> wrote:
> Hi List, > > I am a noob trying to do something that seems like it should be easy but I > can't figure it out. > > I have a table like so: > > id | ref_id | sts > ------------------ > 1 | | 0 > 2 | 1 | 1 > 3 | | 0 > 4 | | 0 > 5 | 4 | 1 > 6 | | 0 > 7 | 6 | 1 > > I want to find the max(id) whose sts is 0 but whose id is not referenced > by ref_id. > > so the answer would be id=3. > > Thanks for any pointers, > Steve > > So, of all the rows whose sts is 0 and the id is not in (or not exists) ref_id....subquery for selection Give me the maximum id...parent query with group by. David J.
