Thread:Project:Support desk/Accidentally overwrote database with old data/reply

If you have the binary log enabled on mysql at the moment you imported the old database, you may recover it using point-in-time recovery:. Well, or at least that is possible during normal operation. I don't know if the import deleted and recreated tables, which may break this. And also for this to work the binary logs should be present since the previous backup, and you should apply them after restoring that backup.

Otherwise you cannot recover your data anymore.

If your wiki is public and indexed by search engines you may recover the last version of pages from the search engines cache.