Currently, Zoho Analytics does not support scheduling more than one import into the same table. However, you can combine the data from both tables for reporting by following the below workaround.
Import data from each of the sources into separate tables. Then do a union to merge them into a single table using our query table features.
If both the tables' data are in the same format, the below query will merge the data.
Select column 1, column 2, ... column m from Table 1
UNION
Select column 1, column 2, ... column n from Table 2
Now, over this newly created query table, you can create the required import schedule.