Jyothi,
"Stock Balance" report under stock module just delivers the same outcome. Do you want to customize the report?
This type of reports can be made via "Script Reports", you can write logic in python scripts including connecting database. So, if are an procedure experts, then make a "Script Reports" to call the mysql procedure. Otherwise, write the same logic in python scripts.
To get an idea of "Script Report", check
https://github.com/webnotes/erpnext/tree/master/accounts/report/gross_profitRegards,
Nabin Hait