70 likes | 92 Views
There are three Components of ER diagram - Entity, Attributes, and Relationships. We have free interactive resources for you, if you are interested in learning the Components of ER diagrams in DBMS then you visit our free online DBMS tutorial. We have industry expert trainers who have more then a decade of experience in their field, if you want to learn then you can enroll in our online and offline classes today. For more info, you can call us at 70-70-90-50-90<br><br>Click on the link: https://tutorials.ducatindia.com/dbms/components-of-er-diagram/
E N D
Learn Components of ER diagram Entity Attributes Relationship Join Online | Offline Classes 70-70-90-50-90 www. tutorials.ducatindia.com
Components of an ER Diagram An ER Diagram includes the following components Entity Attributes Relationships 70-70-90-50-90 www. tutorials.ducatindia.com
70-70-90-50-90 www. tutorials.ducatindia.com
Entity • An entity is a person, place, element, event, or idea about which information is recorded. In an entity-relationship diagram, an entity is described by using a rectangle. 70-70-90-50-90 www. tutorials.ducatindia.com
Attributes • An attribute in an Entity-Relationship Model specifies the properties or features of an entity. It is characterized by an oval or ellipse structure in the entity-relationship diagram. Each oval structures represent one attribute and is continuously linked to its entity, which is in the rectangle in structure. 70-70-90-50-90 www. tutorials.ducatindia.com
Relationships • A relationship is an associating between two or more entities. It represents a real-world association. For example, consider a relation method works_FOR among the two entity types employee and department, which associates or network each employee with the department, and the employee works for, as shown in the figure: • Read More>>>> 70-70-90-50-90 www. tutorials.ducatindia.com
Was This Helpful? Be sure to save this post so you can come back it later! 70-70-90-50-90 www. tutorials.ducatindia.com