No, these can only be found if you are logging anything in your system. Like, which account initiated which request, which request made what change and what time it was etc. These type of logged data can help in understanding what went wrong (if the actions were wrong) and who made a change. If there is no log, then stop searching any further because there ain't any. But this one loss would teach you to create a logging system in your environment. The system would log the changes being made, it would store the user's ID, time of change and what change was made. In my opinion, you should also keep a backup of your databases so that if (under any case) a table is lost or data is not integrated anymore, you can revert it back to a previous version.
The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~