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DFD basically describe the flow of data, means how data can be flow in a system where as ERD defines the relationship between entities.
-> There is no such constrainst like cardinality,participation in dfd as compare to Erd..
->In DFD, we show the storage of file using Parallel line where as ERD is just a conceptual represantation of data...
ATUL
What else can I help you with?
What optionality in er diagram?
Optionality in an ER diagram refers to the way entities participate in relationships. It indicates whether an entity is mandatory (participation is required) or optional (participation is not required) in a relationship. Optionality is commonly represented using symbols like zero or one to denote optional participation and a crow's foot symbol to denote mandatory participation.
What is the difference between Yankee Bond and Bulldog Bond?
A Yankee bond is a bond issued by a foreign entity in the United States in U.S. dollars, while a Bulldog bond is a bond issued by a foreign entity in the United Kingdom in British pounds. The key difference lies in the currency of issuance and the market in which the bonds are sold.
Where would you add cloning to the Venn diagram?
Cloning would be added as a distinct circle outside the existing categories in the Venn diagram to represent a separate concept or technology. This circle would not overlap with any of the existing categories to show that cloning is a unique entity on its own.
Aggregation in dbms?
•A feature of the entity relationship model that allows a relationship set to participate in another relationship set. • • This is indicated on an ER diagram by drawing a dashed box around the aggregation.
Force between two atoms to form stable entity is called?
a bond
Entity Relationship diagram for Hotel Reservation System?
An entity relationship diagram for hotel reservation systems is a map of each entity or thing that has a part in the process of hotel reservations. The diagram maps the relationship between each entity of the process.
Entity relationship diagram for online banking?
An entity-relationship diagram for online banking includes the process of online banking and the relationship between each step. It is a model that maps out, describes, and defines how components are linked for online banking.
What are the difference between Entity Relationship Program and Flow Chart?
ER diagram is Entity Relationship Diagram which shows relationship between different entities in a process.... Data Flow diagram is a symbolic structure which shows the flow of data how it is used in diff stages in a particular process....
What is entity relationship diagrame?
An entity relationship diagram (ERD) represents the entities, or groups of information, and their relationships maintained for a business. An entity relationship diagram represents the entities, or groups of information, and their relationships maintained for a business. An entity relationship diagram represents the entities, or groups of information, and their relationships maintained for a business.
Is a diamond-shape box in a Entity-Relationship diagram refers to?
relationship.....
How E R diagram attributes are represented?
ER diagram stands for Entity relation diagram. There are two main components in a ER diagram one is the entity like (students) and their attributes like (name , rollno) and the relationship between different entitites.
ER diagram for a banking system?
entity relationship diagram on banking system?
What is the difference between Cardinality and Degree?
Degree the number of entity types that participate in a relationship.
Draw complete Entity Relationship Diagram for Railway Reservation System. Make assumption wherever necessary?
draw complete entity relationship diagram for railway reservation system
How do you convert an entity relationship diagram to a table?
converting er diagram to table in dbms?
How to draw entity relationship diagram?
To draw a relationship diagram, start by placing relationship at the center of the paper. Connect entities to the relationship, and branch out with the different attributes.
What isn the Er diagram of library management?
i need a entity relationship diagram of a small library
