Hello Team, I want to add database tags, but at present, it seems only support to add table tags, will there be support for this aspect in the future?

Hi! We have containers in our roadmap, which will solve this issue. https://feature-requests.datahubproject.io/b/User-Experience/p/data-container-support  Containers are going to be groupings of entities (like datasets) that are actually entities themselves. Since a container is an entity, you will be able to add tags and descriptions to it.

I found that we do statistics on the database and store it. Can we store tags about databases in json rather than entities🤔

Yes - I'm actively working on building out modeling of "Containers" - databases, schemas, etc as separate top-level entities. This will allow you to add tags, terms, descriptions, owners, and more at the DB level as you're requesting! It should be something we demo in next Friday (Jan 28) TownHall!