Limiting user access to your database tables

Common data are shared by 2 different systems . as such, try to create a sharing database by 2 systems.

but systems have different access right on tables. like one system are not able to access the other's private data.

but both can access sharing common data.

Here is the way how to do it:

http://marlonribunal.com/limiting-user-access-to-your-database/