This is a fairly classical data modeling concept.
It might be referred to as an intersectional entity, a resolution entity, an associative entity, or in short form, a M:N entity. Silverston calls this concept Intersection or Association entity. Simsion and Witt call these Intersection entities, A ssociative entities, Resolution entities, or Relationship entities. I’d say that the most common terms are Intersection or Associative entity, but I think it depends on what tool one uses and what types of data modeling books one reads.Ī typical example might start out with a many-to-many relationship, say between cars and people: Riordan calls these Junction tables, even in the data model. It would result in an associative entity that looked like this: PARTY -||-is affiliated via-–o-0-is affiliated via-–|| PARTY We created PARTYAFFILIATION to do the same job as OWNERSHIP: So just imagine the relationship being “dog eared” back to the same entity. So we rolenamed one of the relationships for it to be: …which we can’t have, since the foreign key would have migrated twice with the same name. Personally, I prefer to rolename both in these cases so it is very clear which role the foreign key is taking, but it works either way. So if you check out your books on data modeling for the terms I mentioned in the beginning, you might come up with some more examples of why many-to-many relationships resolve to two relationships with an associative entity in the middle.Data modeling is a visual analysis of how various data objects relate to one another for the purpose of building a database or object-oriented programming.
Data modeling progresses from conceptual model to logical model to physical schema. It creates a strong foundational design for a database so that it is more easily searchable, requires less maintenance, and works quickly.
Data models enable better, more consistent data management. What Are Data Modeling Tools?Ī data modeling tool facilitates quick and efficient database design and minimizes human error.
Associative entity navicat data modeler software#
dbForge Studio Database Designer for MySQLĪrchi is an open-source data modeling toolkit that helps users create data models and sketches in ArchiMate.Read more: What Is Vector Similarity Search? Best Data Modeling Tools for 2022 Vendor The software helps construct a high-performance database, generate reports, and create a data definition language (DDL) to support business intelligence through data-driven decisions. The ArchiMate visual notation language is an open enterprise architecture standard that facilitates data visualization, analysis, and description across and within business domains across various platforms. ArchiMate is different from The Open Group Architecture Framework (TOGAF) in that it provides high-level metamodeling, as well as detailed models, according to domain or layer.
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