When should I use associative entity? - Database Administrators …
Jan 10, 2022 · I am studying DBMS and I have read that associative entity is used when there is a many to many relationships but I am confused with the graph. It has many to many …
What is the correct way to define and query a 3NF Associative entity
May 25, 2020 · A subset of my database contains the tables contacts, networks and networkContacts which is my associative entity. I have defined it using a composite primary …
Many-to-many relationship when one entity is without attributes
Sep 22, 2015 · I understand that the basic approach is to create a third table (associative entity) that connects the entities in many-to-many relationship. But what happens if one of the entities …
MySQL - Creating an associative table - Database Administrators …
Apr 9, 2015 · MySQL - Creating an associative table Ask Question Asked 10 years, 9 months ago Modified 10 years, 9 months ago
When creating a database using an ERD, what do the entities and ...
Oct 27, 2018 · When implementing an ERD as physical database the following mappings apply: An entity becomes a table (set of rows) A relationship becomes a foreign key. Associative …
Is it better to omit associative tables in displaying many to many ...
Jul 8, 2020 · Let's say I have 2 entities Student and Class with many to many relationships. Usually, in the textbook, it is recommended that we create another associative table (maybe …
Do I relate entities that are indirectly related when creating a ...
Aug 16, 2015 · Registration becomes an associative entity to show a student registers for one or more offerings, and an offering can be registered by one or more students. It isn't the case …
When to add another lookup table for the same field
An IngredientCategory groups zero-one-or-many Ingredients This means that Recipe and RecipeCategory are connected in another M:N relationship, which entails the existence of …
database design - Need help on my first ER diagram - Database ...
Sep 1, 2015 · Therefore I added another associative entity called Operating Site to show this. Find the Attributes The attributes were listed pretty clearly in the requirements with statements like: …
Association Tables - Database Administrators Stack Exchange
Jun 6, 2020 · The technical name for your association (or 'linking') table is an associative entity - there are ~ 15 alternative names listed on that page. I explore the logic behind these - in …