Zoho Reports has now enhanced the Variable feature which was introduced recently to setup groups. You can now create variables and map the values to groups. If you have created groups for sharing and collaboration, you can map variable values to them.
To map a variable to a group

Zoho Reports recently released a very easy and simple approach to import data from Cloud databases. With this update we are supporting hourly periodic schedules to fetch the latest data automatically. The available options are:

You can set this hourly periodic schedule while setting up the reporting database. Please do note that, this option is available only in the paid plans of Zoho Reports.
Existing users, who have already setup the reporting database can change the interval using the Edit Setup option. Click to know more.