One row per report. org_name is the receiver that sent it, date_begin to date_end the period it covers, and the policy_ fields the policy it found published. messages is how many messages it covers, and records how many lines it has.
Parameters
Name
Where
What it is
days
query
How many days back to look. 30 if you leave it out.
domain
query
Only reports about this domain.
limit
query
At most this many reports. 100 if you leave it out, 1000 at most.