Document creation statistic data

Hi,

I've been task to create report that will show some kind of statistic about document creation, by date, username etc in our ERP system. First thing I came up with is to pull documents header data and count them in query designer.

I know i need data from EKKO and VBAK tables for purchasing and sales, any other?

Also if you have any better suggestion ...?

Regards,

Mijodrag