T-SQL Tag Database Architecture Design?

Question

Scenario

I am building a database that contains a series of different tables. These consist of a COMMENTS table, a BLOGS table & an ARTICLES table. I want to be abl

Answer 1

usually many-to-many relationship implemented exactly as you describe it.

Auto-incrementing IDs it is good idea since it guarantee that they will be unique.

And you can use guids if you want to tag comments and articles with the same tag(instead of 6 tables you need just 5). But searching with guids may be more slow.