How to structure database for unread item alerts per user
问题 I just have a general database theory question. I have a need to make something similar to showing what posts/items a user has viewed or not (such as in a forum) or an unread email message. What I have is there are posts that multiple users can view, but it needs to separate by user who has actually viewed it. So if User A viewed Post 1, it would no longer show that Post 1 is a new item to view, but to User B, it would still show that Post 1 is a new item to view. I've search for other ideas