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  2. Entity–relationship model - Wikipedia

    en.wikipedia.org/wiki/Entityrelationship_model

    Rather, they show entity sets (all entities of the same entity type) and relationship sets (all relationships of the same relationship type). For example, a particular song is an entity, the collection of all songs in a database is an entity set, the eaten relationship between a child and his lunch is a single relationship, and the set of all ...

  3. Category:Database models - Wikipedia

    en.wikipedia.org/wiki/Category:Database_models

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  4. File:ER Diagram MMORPG.svg - Wikipedia

    en.wikipedia.org/wiki/File:ER_Diagram_MMORPG.svg

    Draw the ER diagram for representing the information requirement of an university database: There are several colleges in the university. Each college has a name, location, and strength. A college offers many courses over two terms- Spring and Autumn- during which one or more of these courses are offered.

  5. Database design - Wikipedia

    en.wikipedia.org/wiki/Database_design

    A sample entityrelationship diagram. One of the most common types of conceptual schemas is the ER (entityrelationship model) diagrams. Attributes in ER diagrams are usually modeled as an oval with the name of the attribute, linked to the entity or relationship that contains the attribute.

  6. List of massively multiplayer online role-playing games

    en.wikipedia.org/wiki/List_of_massively...

    The term MMORPG was first coined by Ultima Online creator Richard Garriott in 1997. [13] Uncharted Waters Online: Active 3D Historical (maritime) Free-to-play (on international server) 2005 (Japan) 2010 (West) Underlight: Active 2.5D: Fantasy (Dream) Free-to-play 1998 Standalone & Steam Original servers were shut down in December 2006.

  7. Database model - Wikipedia

    en.wikipedia.org/wiki/Database_model

    Thus, the "relation" in "relational database" refers to the various tables in the database; a relation is a set of tuples. The columns enumerate the various attributes of the entity (the employee's name, address or phone number, for example), and a row is an actual instance of the entity (a specific employee) that is represented by the relation.

  8. Database schema - Wikipedia

    en.wikipedia.org/wiki/Database_schema

    The database schema is the structure of a database described in a formal language supported typically by a relational database management system (RDBMS). The term " schema " refers to the organization of data as a blueprint of how the database is constructed (divided into database tables in the case of relational databases ).

  9. Associative entity - Wikipedia

    en.wikipedia.org/wiki/Associative_entity

    An associative entity is a term used in relational and entityrelationship 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)