Probably you asked yourself sometimes how to do this, and then tried to find in user guides. Well there is a much easier way to see this.
In the installation directory go to:
(this is an example for version 3.1.5)
C:\Program Files\Cisco SCA\SCA BB Console 3.1.5\plugins\com.cisco.p3.apps.scasbbtemplates_3.1.5.16\templates
there you will have a list of all reports you can see in Reporter on SCA BB Console. If you enter the directory of specific global report, you will find a definition in xml file for each report.
If you open this file (and do not modify it) you will see at the end of xml file something like this:
SELECT
DISTINCT
...
FROM
RPT_SUR
WHERE
...
GROUP BY
...
ORDER BY
...
Here it is very easy to see that table used for 'Subscriber Bandwidth per Service' report is RPT_SUR.
Now you can check for example by which RDRs this table is populated on this link:
and in the same link description of each RDR: