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EntityRelationship (E/R) Model Dr P Srinivasan Kumar Professor CSAE Dept I T MadrasEntityRelationship (E/R) Model Widely used conceptual level data model proposed by Peter P Chen in the 1970s Data

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How to fill out entity-relationship

01

Start by identifying the entities and their relationships in the system you are designing.

02

Create a rough draft of the entity-relationship diagram (ERD) by drawing boxes for entities and lines for relationships.

03

Specify the cardinality of relationships, indicating how many instances of one entity can be associated with instances of another entity.

04

Add attributes to entities, defining the properties or characteristics of each entity.

05

Normalize the ERD to eliminate redundancy and ensure data integrity.

06

Refine the ERD by considering constraints, such as uniqueness and referential integrity.

07

Validate the ERD by verifying that it accurately represents the system's requirements and constraints.

08

Implement the ERD using a suitable database management system (DBMS) and create the necessary tables with appropriate relationships and constraints.

09

Populate the tables with actual data, ensuring that the relationships between entities are properly maintained.

10

Regularly update and maintain the ERD as the system evolves or new requirements emerge.

Who needs entity-relationship?

01

Database administrators and designers use entity-relationship diagrams to visualize and design the structure of a database.

02

Software developers and programmers refer to entity-relationship diagrams to understand the data model and relationships in a system.

03

Business analysts and system analysts use entity-relationship diagrams to document and analyze the data requirements of a system.

04

Project managers may need entity-relationship diagrams to communicate the database design to stakeholders and ensure alignment with project goals.

05

Database users, such as end-users or data analysts, can benefit from entity-relationship diagrams to comprehend the data structure and relationships within a database.

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What is entity-relationship?

Entity-relationship is a data modeling technique used to describe the relationships between entities in a database.

Who is required to file entity-relationship?

Entities or organizations with databases that have relationships between entities are required to file entity-relationship.

How to fill out entity-relationship?

Entity-relationship forms can be filled out by documenting the entities involved, their attributes, and the relationships between them.

What is the purpose of entity-relationship?

The purpose of entity-relationship is to provide a visual representation of the relationships between entities in a database, aiding in database design and maintenance.

What information must be reported on entity-relationship?

Entity-relationship forms typically include information about the entities, their attributes, and the relationships between them.

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