[appengine-java] how should I design my data model for following scenario

I want retrieve invoice numbers depending upon items e.g. InvoiceNoItem InvoiceDate 10 item_a 11 item_a 11 item_b 11 item_z 12 item_a 12 item_c 12 item_x 13 item_a 13 item_x User can search on item(s) and can also include period (invo

[appengine-java] Re: how should I design my data model for following scenario

es, if the list is small enough you can cook up > the set operations in memory. > > On Jul 11, 6:58 am, Parvez wrote: > > > I want retrieve invoice numbers depending upon items e.g. > > > InvoiceNo        Item          InvoiceDate > > > 10      item_a > > 11