Document No and Purchasing doc

Hi Gurus,

I am so new to SAP, so appreciate if you could advise: if there is/ are any report(s) in SAP R3P

i) that can provide all purchasing doc in related to document no for a selected period, and

ii) any (other report) that can return the details of purchase order (incl. materials group and quantity order) in mass (in case I need to look up for details of, say, 5000 orders- that cannot be done via ME23N).

Many thanks.