1.

What Is Erd?

Answer»

DATA models are tools used in ANALYSIS to describe the data requirements and ASSUMPTIONS in the system from a top-down perspective. They ALSO set the stage for the design of databases later on in the SDLC.

  • There are three basic elements in ER models:
  • Entities are the “things” about which we seek information.
  • Attributes are the data we collect about the entities.
  • Relationships PROVIDE the structure needed to draw information from multiple entities

Data models are tools used in analysis to describe the data requirements and assumptions in the system from a top-down perspective. They also set the stage for the design of databases later on in the SDLC.


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