Entity Relationship Model Diagram

unique entity relationship model diagram or the er diagram 79 entity relationship diagram conceptual model

unique entity relationship model diagram or the er diagram 79 entity relationship diagram conceptual model.

good entity relationship model diagram and entity relationship model and diagrams continued 17 entity relationship model vs class diagram

good entity relationship model diagram and entity relationship model and diagrams continued 17 entity relationship model vs class diagram.

best of entity relationship model diagram and lecture summary components of the entity relationship model 49 how to draw entity relationship diagram in dbms

best of entity relationship model diagram and lecture summary components of the entity relationship model 49 how to draw entity relationship diagram in dbms.

good entity relationship model diagram or types of entity relationship diagrams 39 entity relationship database diagram

good entity relationship model diagram or types of entity relationship diagrams 39 entity relationship database diagram.

fresh entity relationship model diagram and summary presentation layer er model 18 entity relationship diagram conceptual model

fresh entity relationship model diagram and summary presentation layer er model 18 entity relationship diagram conceptual model.

luxury entity relationship model diagram or 2 entity relationship model diagrams class hierarchies weak entity sets from e r diagrams to relations 2 84 entity relationship diagram vs domain model

luxury entity relationship model diagram or 2 entity relationship model diagrams class hierarchies weak entity sets from e r diagrams to relations 2 84 entity relationship diagram vs domain model.

ideas entity relationship model diagram and relational database lecture 2 entity relationship modelling 2 85 entity relationship diagram vs data model

ideas entity relationship model diagram and relational database lecture 2 entity relationship modelling 2 85 entity relationship diagram vs data model.

best of entity relationship model diagram and e r diagram for exercise 24 entity relationship model and diagram

best of entity relationship model diagram and e r diagram for exercise 24 entity relationship model and diagram.

entity relationship model diagram or entity relationship model wiring diagram document data controlled vocabulary 19 entity relationship diagram logical data model

entity relationship model diagram or entity relationship model wiring diagram document data controlled vocabulary 19 entity relationship diagram logical data model.

amazing entity relationship model diagram for entity relationship model 2 contents introduction 88 how to make entity relationship diagram model in dbms

amazing entity relationship model diagram for entity relationship model 2 contents introduction 88 how to make entity relationship diagram model in dbms.

beautiful entity relationship model diagram and 1 1 students entity relationship model diagrams to represent designs 14 define entity relationship model diagram

beautiful entity relationship model diagram and 1 1 students entity relationship model diagrams to represent designs 14 define entity relationship model diagram.

entity relationship model diagram or thumbnail of a video 69 entity relationship model diagram example

entity relationship model diagram or thumbnail of a video 69 entity relationship model diagram example.

beautiful entity relationship model diagram for er diagram for company 26 entity relationship model vs class diagram

beautiful entity relationship model diagram for er diagram for company 26 entity relationship model vs class diagram.

elegant entity relationship model diagram and entity relationship diagram 24 chens entity relationship data erd model

elegant entity relationship model diagram and entity relationship diagram 24 chens entity relationship data erd model.

elegant entity relationship model diagram for 2 1 2 relationships connect two or more entity sets represented by diamonds taking 94 conceptual data model vs entity relationship diagram

elegant entity relationship model diagram for 2 1 2 relationships connect two or more entity sets represented by diamonds taking 94 conceptual data model vs entity relationship diagram.

elegant entity relationship model diagram for e r diagram 15 entity relationship diagram conceptual model

elegant entity relationship model diagram for e r diagram 15 entity relationship diagram conceptual model.

inspirational entity relationship model diagram or 3 entity relationship 56 entity relationship database diagram

inspirational entity relationship model diagram or 3 entity relationship 56 entity relationship database diagram.

amazing entity relationship model diagram or entity relationship model 2 chapter objectives 49 define entity relationship model diagram

amazing entity relationship model diagram or entity relationship model 2 chapter objectives 49 define entity relationship model diagram.

idea entity relationship model diagram or 1 f designing e r diagrams 1 the entity relationship model chapter 65 examine the following entity relationship model diagram

idea entity relationship model diagram or 1 f designing e r diagrams 1 the entity relationship model chapter 65 examine the following entity relationship model diagram.

entity relationship model diagram and document entity relationship model diagram tea ceremony drawing controlled vocabulary 47 entity relationship diagram logical data model

entity relationship model diagram and document entity relationship model diagram tea ceremony drawing controlled vocabulary 47 entity relationship diagram logical data model.

Logician John Venn developed the Venn diagram in complement to Eulers concept. His diagram rules were more rigid than Eulers - each set must show its connection with all other sets within the union, even if no objects fall into this category. This is why Venn diagrams often only contain 2 or 3 sets, any more and the diagram can lose its symmetry and become overly complex. Venn made allowances for this by trading circles for ellipses and arcs, ensuring all connections are accounted for whilst maintaining the aesthetic of the diagram.

A Venn diagram, sometimes referred to as a set diagram, is a diagramming style used to show all the possible logical relations between a finite amount of sets. In mathematical terms, a set is a collection of distinct objects gathered together into a group, which can then itself be termed as a single object. Venn diagrams represent these objects on a page as circles or ellipses, and their placement in relation to each other describes the relationships between them. Commonly a Venn diagram will compare two sets with each other. In such a case, two circles will be used to represent the two sets, and they are placed on the page in such a way as that there is an overlap between them. This overlap, known as the intersection, represents the connection between sets - if for example the sets are mammals and sea life, then the intersection will be marine mammals, e.g. dolphins or whales. Each set is taken to contain every instance possible of its class; everything outside the union of sets (union is the term for the combined scope of all sets and intersections) is implicitly not any of those things - not a mammal, does not live underwater, etc.

The structure of this humble diagram was formally developed by the mathematician John Venn, but its roots go back as far as the 13th Century, and includes many stages of evolution dictated by a number of noted logicians and philosophers. The earliest indications of similar diagram theory came from the writer Ramon Llull, whos initial work would later inspire the German polymath Leibnez. Leibnez was exploring early ideas regarding computational sciences and diagrammatic reasoning, using a style of diagram that would eventually be formalized by another famous mathematician. This was Leonhard Euler, the creator of the Euler diagram.

Euler diagrams are similar to Venn diagrams, in that both compare distinct sets using logical connections. Where they differ is that a Venn diagram is bound to show every possible intersection between sets, whether objects fall into that class or not; a Euler diagram only shows actually possible intersections within the given context. Sets can exist entirely within another, termed as a subset, or as a separate circle on the page without any connections - this is known as a disjoint. Furthering the example outlined previously, if a new set was introduced - birds - this would be shown as a circle entirely within the confines of the mammals set (but not overlapping sea life). A fourth set of trees would be a disjoint - a circle without any connections or intersections.

Usage for Venn diagrams has evolved somewhat since their inception. Both Euler and Venn diagrams were used to logically and visually frame a philosophical concept, taking phrases such as some of x is y, all of y is z and condensing that information into a diagram that can be summarized at a glance. They are used in, and indeed were formed as an extension of, set theory - a branch of mathematical logic that can describe objects relations through algebraic equation. Now the Venn diagram is so ubiquitous and well ingrained a concept that you can see its use far outside mathematical confines. The form is so recognizable that it can shown through mediums such as advertising or news broadcast and the meaning will immediately be understood. They are used extensively in teaching environments - their generic functionality can apply to any subject and focus on my facet of it. Whether creating a business presentation, collating marketing data, or just visualizing a strategic concept, the Venn diagram is a quick, functional, and effective way of exploring logical relationships within a context.

Other Collections of Entity Relationship Model Diagram

Best Of Entity Relationship Model Diagram And E R Diagram For Exercise 24 Entity Relationship Model And DiagramBest Of Entity Relationship Model Diagram And Lecture Summary Components Of The Entity Relationship Model 49 How To Draw Entity Relationship Diagram In DbmsLuxury Entity Relationship Model Diagram Or 2 Entity Relationship Model Diagrams Class Hierarchies Weak Entity Sets From E R Diagrams To Relations 2 84 Entity Relationship Diagram Vs Domain ModelEntity Relationship Model Diagram Or Entity Relationship Model Wiring Diagram Document Data Controlled Vocabulary 19 Entity Relationship Diagram Logical Data ModelElegant Entity Relationship Model Diagram For 2 1 2 Relationships Connect Two Or More Entity Sets Represented By Diamonds Taking 94 Conceptual Data Model Vs Entity Relationship DiagramGood Entity Relationship Model Diagram Or Types Of Entity Relationship Diagrams 39 Entity Relationship Database DiagramElegant Entity Relationship Model Diagram For E R Diagram 15 Entity Relationship Diagram Conceptual ModelIdea Entity Relationship Model Diagram Or 1 F Designing E R Diagrams 1 The Entity Relationship Model Chapter 65 Examine The Following Entity Relationship Model Diagram

Leave a Reply

Your email address will not be published. Required fields are marked *

a b c d e f g h i j k l m n o p q r s t u v w x y z