The following mysql sample will report tickets with comments added in the last 7 days.
SELECT hd_ticket.id,
hd_ticket.title,
TC.timestamp
FROM hd_ticket_change TC
left join hd_ticket
ON hd_ticket_id = hd_ticket.id
WHERE Cast(TC.timestamp AS DATETIME) > Date_sub(Now(), interval 7 day)
AND description = ''
-----------------------------------------------------------------------NOTICE--------------------------------------------------------------------------------------------
-- CODE WRITTEN BY QUEST KACE SUPPORT FOR DEMONSTRATION PURPOSES ONLY
--USE OF THIS CODE CONFIRMS THE NEED FOR TESTING AND USER ACCEPTS ALL RESPONSIBILITY FOR USE AND MISUSE OF CODE.