![]() ![]() students, courses, books, campus, employees, payment, projects. These are the tables of your database, i.e. The number of tables you need for your database – Entities is the basic objects of ERDs. There are three components in ERD: Entities, Attributes, and Relationships. An ER Diagram can be easily transformed into the relational schema. It allows database professionals to describe an overall design concisely yet accurately. What is Entity Relationship Diagram?Īn Entity Relationship Diagram (ERD) is a pictorial representation of the information that can be captured by a database. It serves as a guide used by database analysts and software developers in the design and implementation of a system and the underlining database. ![]() Data models are used for many purposes, from high-level conceptual models, logical to physical data models and typically represented by the entity-relationship diagram. It is a very powerful expression of the company’s business requirements. View and play PowerPoint presentations online.ĭata modeling is a technique to document a software system using entity relationship diagrams (ER Diagram) which is a representation of the data structures in a table for a company’s database. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |