How to combine data from two reports into one single report

Hello eveyrone,

I would like to know if there is a really easy way to combine data from two reports (exactly the same reports, but not the same data because of different period of time) into one single report (to make a sum of the data) ?

The point is that we will change the datasource between the two versions of the reports. Version 1 takes data in DB1 and version will take data in DB2.

And for example, when we will be in DB2, if we refresh a report with data of "last month", I will just have the data for the first week in DB2 for example...

I don't know If I'm clear because I'm really a noob in Crystal Reports, but if I'm not clear, don't hesitate to tell it.

Thanks for your help,

Xavier