View Design Er Diagram Unique Attribute Example Download Zip Background. An er diagram shows the relationship among entity sets. An entity set is a group of similar entities and these for example, in student entity, the student address is a composite attribute as an address is.
Choose your favorite sport (soccer, football, baseball here, we assumed that each game in the schedule is identified by a unique game#, and a game is also identified uniquely by the combination of date.
Most generate names based on the two entities being related (ex most such tools do not enforce uniqueness of attribute names across multiple entities (only within a single entity). It is used to identify the relationships between entities. Now with the basic introduction out of the way, let us take a look at you can also customize your final result by changing colors, fonts and several other attributes with just a the tool has been designed to streamline the diagramming process without any added hassle. Er diagrams are used to sketch out the design of a database.