What is erd meaning?

ERD stands for "Entity-Relationship Diagram." It is a statistical model that represents the relationships between entities within a database. In an ERD, entities are represented as tables, relationships between entities are represented by lines linking these tables, and attributes of entities are represented by columns in the tables. ERD is a visual representation of the database design that helps developers and designers to understand the data flow within a database. It is a tool used in designing a database schema, defining relationships among tables, and improving communication between developers, stakeholders, and users.