Where can we get discourse database schema design diagram?

is it possible to get a ready to import sql dump file?
it seems the ruby dependency is touch

for example will like to know what are primary keys and foreign keys et cetera

i am more interested in the relationships and connections between these tables

users,
user_options,
api_keys,
user_api_keys,
user_auth_tokens,
user_auth_token_logs,
notifications

thanks