I have a fairly basic question about database design where im not sure which approach is considered correct.
I have two different entities: Clients and Services. Both allow users to add progressive updates about the two entities.
The update/message format is exactly the same for both. Should I make two different tables:
client_updates and service_updates or one table with extra columns : is_client, client_id, service_id, where either client_id or service_id would be null depending on the is_client boolean?
The major problem is simply relating the foreign key in the updates table back to the correct entity, client or service.
