Hi @miyeung
You would have to look in the metadata. It can get quite complicated to find all tables used.
Metabase Metadata SQL
I would highly recommend that you migrate away from H2 if you're using Metabase in production:
https://www.metabase.com/docs/latest/operations-guide/migrating-from-h2.html
And latest release is 0.39.3: https://github.com/metabase/metabase/releases/latest