Data model: Difference between revisions

Browse history interactively

← Previous edit

Content deleted Content added

VisualWikitext

Revision as of 09:43, 29 July 2025 edit Onel5969 (talk \| contribs) Autopatrolled, Extended confirmed users, Page movers, New page reviewers, Pending changes reviewers, Rollbackers 992,672 edits m Disambiguating links to Object-orientation (link changed to Object-oriented programming) using DisamAssist. ← Previous edit		Latest revision as of 11:53, 21 August 2025 edit undo MrOllie (talk \| contribs) Extended confirmed users, Pending changes reviewers, Rollbackers 255,580 edits cut examplefarlm
(One intermediate revision by one other user not shown)
Line 70: : The hierarchical model is similar to the network model except that links in the hierarchical model form a tree structure, while the network model allows arbitrary graph. ; [[Network model]] : ~~This~~The [[network model]], also [[graph model]], organizes data using two fundamental constructs, called records and sets. Records (or nodes) contain fields (i.e. attributes), and sets (or edges) define one-to-many, many-to-many and many-to-one relationships between records: one owner, many members. The network data model is an abstraction of the design concept used in the implementation of databases. Network models emphasise interconnectedness, making them ideal for applications where relationships are crucial, like social networks or recommendation systems. This structure allows for efficient querying of relationships without expensive joins. ; [[Relational model]] : is a database model based on first-order predicate logic. Its core idea is to describe a database as a collection of predicates over a finite set of predicate variables, describing constraints on the possible values and combinations of values. The power of the relational data model lies in its mathematical foundations and a simple user-level paradigm.