Ad
related to: er diagram examples pdf free printable chart
Search results
Results From The WOW.Com Content Network
An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).
An associative entity is a term used in relational and entity–relationship theory. A relational database requires the implementation of a base relation (or base table) to resolve many-to-many relationships. A base relation representing this kind of entity is called, informally, an associative table. An associative entity (using Chen notation)
Entity-relationship diagram. Add languages. Add links. ... Print/export Download as PDF ... Appearance. move to sidebar hide. From Wikipedia, the free encyclopedia ...
A sample ER diagram. Database requirements for a CD collection in EXPRESS-G notation.. In 1976, an entity-relationship (ER) graphic notation was introduced by Peter Chen.He stressed that it was a "semantic" modelling technique and independent of any database modelling techniques such as Hierarchical, CODASYL, Relational etc. [2] Since then, languages for information models have continued to ...
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
Sankey diagram; Schematic; Schreinemaker's analysis; Seating plan; Sentence diagram; Shear and moment diagram; Shit flow diagram; Single-line diagram; Skew-T log-P diagram; Spacetime diagram; Specification and Description Language; Spider diagram; Spider mapping; Spin network; State diagram; Straight-line diagram; Streamgraph; Structured entity ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The SERM (structured entity relationship model) is an amplification of the ERM which is commonly used for data modeling. It was first proposed from Prof. Dr. Elmar J. Sinz in 1988. The SERM is commonly used in the SAP -world for the data modeling .