Category:Entity-relationship models
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describes inter-related things of interest in a specific domain of knowledge;composed of entity types (which classify the things of interest) and specifies relationships that can exist between instances of those entity types | |||||
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Entity-Relationship Models (ERM) is an abstract conceptual representation of structured data. Entity-relationship modeling is a relational schema database modeling method, used in software engineering to produce a type of conceptual data model or semantic data model of a system, often a relational database, and its requirements in a top-down fashion. Diagrams created using this process are called entity-relationship diagrams, or ER diagrams or ERDs for short.
Originally proposed in 1976 by Peter Chen, many variants of the process have subsequently been devised.
See also:
Media in category "Entity-relationship models"
The following 95 files are in this category, out of 95 total.
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2-way-relation-with-arrow.svg 492 × 93; 5 KB
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3-way-ERD.png 476 × 170; 11 KB
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Scd model.png 695 × 503; 32 KB
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An example of entity relationship diagram in Hebrew.jpg 1,027 × 676; 64 KB
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An example of matrix processing for solving the problem.png 1,352 × 3,317; 420 KB
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CPT-Databases-Example1MLeagueTeam.svg 454 × 88; 5 KB
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CPT-Databases-ExampleLinkTables.svg 632 × 253; 11 KB
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CPT-Databases-ExampleReceipt.svg 630 × 280; 9 KB
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CPT-Databases-Exercise-MMStudentClass.svg 454 × 88; 5 KB
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CPT-Databases-Exercise-PlayerAnswerQuestion.svg 383 × 277; 6 KB
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CPT-Databases-Exercise11.svg 454 × 88; 5 KB
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CPT-Databases-ManytoMany.svg 460 × 102; 5 KB
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CPT-Databases-OnetoMany.svg 460 × 102; 4 KB
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CPT-Databases-OnetoMany2.svg 460 × 102; 4 KB
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CPT-Databases-OnetoOne.svg 460 × 102; 4 KB
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Data model in ER.png 806 × 507; 11 KB
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Data model in IE.png 806 × 507; 27 KB
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Databases-ManyToManyWJunction.jpg 1,320 × 439; 37 KB
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DER.png 800 × 566; 36 KB
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Diagrama Empleado.jpeg 790 × 151; 24 KB
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Diagrama Entidad Relacion.svg 932 × 636; 66 KB
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DICONDE Figure 1.png 977 × 889; 89 KB
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Eer-model-key.svg 75 × 164; 856 bytes
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EER-specialisation.svg 413 × 60; 12 KB
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Eight elements of transaction (bookkeeping).svg 372 × 262; 7 KB
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Ejemplo Diagrama E-R extendido.PNG 490 × 242; 10 KB
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Entitat relacio esports.jpg 956 × 713; 111 KB
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Entity Relation Modell Beispiel Analyse.png 979 × 618; 166 KB
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Entity Relation Modell Beispiel Tabellen.png 979 × 554; 154 KB
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Entity Relationship Diagram.jpg 597 × 336; 27 KB
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Entity Relationship metamodel.png 1,582 × 1,033; 87 KB
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Entity-Relationship Example Diagram (DE).png 205 × 132; 2 KB
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Entity-Relationship Model (diagram).png 691 × 748; 16 KB
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Entity-relationship model regular and weak entities.svg 670 × 210; 1,007 bytes
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Entity-Relationship-Modell Attribut Klassen.svg 1,153 × 572; 2 KB
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Entity-Relationship-Modell reguläre und schwache Entität.svg 670 × 210; 987 bytes
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Entity-Relationship-Modell.svg 210 × 80; 10 KB
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ER diagram dutch 1.svg 163 × 107; 6 KB
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ER diagram dutch 2.svg 163 × 107; 6 KB
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ER diagram dutch getrouwdmet.png 500 × 50; 6 KB
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ER diagram dutch getrouwdmet.svg 273 × 126; 6 KB
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ER diagram dutch isa.svg 246 × 176; 7 KB
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ER diagram dutch relationship with attribute.svg 303 × 123; 5 KB
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ER diagram dutch set attribute.svg 87 × 94; 4 KB
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ER Diagram MMORPG.png 1,600 × 1,425; 313 KB
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ER Diagram MMORPG.svg 1,390 × 1,160; 192 KB
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ERD-artist-performs-song.svg 370 × 95; 6 KB
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ERD-Attribute types.png 6,368 × 4,817; 502 KB
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Erd-attribute.png 105 × 37; 2 KB
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ERD-entity (product).png 3,258 × 1,992; 113 KB
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ERD-entity(product+id).png 3,179 × 2,441; 122 KB
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Erd-entity-relationship-example1 kr.png 283 × 59; 3 KB
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Erd-entity-relationship-example1.jpg 381 × 84; 16 KB
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Erd-entity-relationship-example1.png 283 × 59; 3 KB
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Erd-entity-relationship-example1.svg 283 × 59; 6 KB
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Erd-entity-with-attribute.jpg 271 × 84; 11 KB
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Erd-entity-with-attribute.svg 193 × 39; 4 KB
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Erd-entity.png 72 × 38; 647 bytes
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Erd-id-as-primary-key.jpg 100 × 64; 5 KB
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Erd-id-as-primary-key.png 55 × 37; 919 bytes
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Erd-id-as-primary-key.svg 55 × 37; 762 bytes
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ERD-relation(order).png 1,413 × 424; 21 KB
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ERD-relation(order+date).png 2,964 × 1,042; 49 KB
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Erd-relationship-with-attribute.jpg 270 × 85; 12 KB
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Erd-relationship-with-attribute.png 194 × 51; 3 KB
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Erd-relationship-with-attribute.svg 344 × 100; 2 KB
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EsempioER.jpeg 496 × 135; 14 KB
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Example ERD2.png 549 × 153; 12 KB
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Innovacion supra-entidad Productos.png 960 × 491; 174 KB
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Innovacion supra-entidad.png 960 × 567; 174 KB
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Many to many relationship example.png 768 × 614; 5 KB
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Many to one relationship example.png 768 × 614; 4 KB
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Minmax Notation Mannschaft Spieler.png 416 × 63; 4 KB
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MnTerSys.jpg 649 × 346; 23 KB
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One to one relationship example.png 768 × 614; 6 KB
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Ontologia temporada futbol.jpg 1,280 × 720; 150 KB
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OpIndia ownership graph.svg 1,057 × 880; 233 KB
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Products supra-entity innovation.png 718 × 378; 107 KB
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Relationship between Angola, Dokolo, and Galp.svg 431 × 287; 13 KB
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REST information model.png 3,963 × 1,563; 289 KB
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Skos metamodel.png 1,572 × 1,886; 154 KB
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Spezialisierg Generalisierg.png 453 × 379; 5 KB
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Spezialisierg und Generalisierg.svg 540 × 460; 31 KB
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Supra-entidad Productos.png 529 × 340; 83 KB
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Supra-entidad.png 453 × 264; 50 KB
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Supra-entity innovation.png 718 × 378; 101 KB
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Supra-entity Products.png 529 × 340; 74 KB
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Supra-entity.png 453 × 264; 35 KB
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WADP Lua Tables ER Diagram.png 958 × 973; 204 KB
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WordPress file-reference ERD.svg 543 × 440; 8 KB
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Οντότητα.png 300 × 300; 4 KB
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人物系カテゴリと見る場合1.jpg 603 × 278; 24 KB
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人物系カテゴリと見る場合2.jpg 603 × 359; 29 KB
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地理系カテゴリと見る場合1.jpg 590 × 248; 17 KB
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地理系カテゴリと見る場合2.jpg 513 × 322; 21 KB