| 373 | | The many-to-many relationship FavoriteListing is already decomposed into the separate relation FavoriteListings(saved_user_id, saved_listing_id), so no further decomposition is required for 4NF. |
| 374 | | {{{The schema satisfies 4NF.}}} |
| | 373 | |
| | 374 | The many-to-many relationship between Course and Category is already decomposed into the separate relation: |
| | 375 | |
| | 376 | CourseCategory(course_id, category_id) |
| | 377 | |
| | 378 | This relation contains only the composite key and no additional descriptive attributes, so no further decomposition is required. |
| | 379 | |
| | 380 | All other relations describe a single entity or relationship around one key, and no independent multi-valued facts are stored together in the same relation. |
| | 381 | |
| | 382 | {{{Therefore, the schema satisfies 4NF.}}} |