I have a cDbCJGrid, showing records of timemangement, with a constrain on
weeknumber/personnumber. In all records listed there's a numeric field.
I would like to show the total of the numeric field for the constrained lines and
(of course) that total should be adjusted when I add, change or delete a line.
Can that somehow be done with the standard constrain or do I have to program
the list myself (pbstaticdata)? If so, are there any examples?