News with categories, need second normal form SQL?

Question

MySQL

Any news. News has categories. Categories can be created. Need to create a news table, a table with categories, and a table with post_id category_id? Or is there a simpler option, so as not to get confused in the sample?

Answer 1

Any news. News has categories.

Just create a category_id column in the news table and that's it. Why another table?
PS
The third table makes sense only if several categories can be assigned to one news at once, by analogy with tags on a toaster.