A monthly schedule, such as
GroupID // groupid
- Given a time period, such as the current day/the latest 7 days/the current month/April 12, 2015 ~ June 17, 2015, count the number of message of each group in the given time period
- According to the counted number of message, group is sorted and paginated for output.
2. If innodb is divided into tables, it can be processed by merge.