demonstrate that the two notations give the same support, while in general UML class diagrams provide a better support with respect to ER diagrams during verification activities 由二个记法给出在维护活动期间结果显示出,二个记法提供同一支持,而在一般UML类图提供更好的支持关于ER图在证明活动期间[...
An article that contains everything on ER diagrams, entity symbols, attribute symbols, relationship symbols, cardinality, and several other ER diagram notations used worldwide.
demonstrate that the two notations give the same support, while in general UML class diagrams provide a better support with respect to ER diagrams during verification activities 关于二个记法提供的支持在维护活动期间结果显示出,二个记法提供同一支持,而在一般UML类图提供更好的支持关于ER图在证明活动期间[...
There are four database templates: Chen’s, Crow’s Foot, IDEF1X and UML. Each template can be used to model a database system in a different notation. We’ll describe the components of a database diagram and then cover each of the notations. Entity Relationship Diagrams Visio’s...