ERD means expresses the existence of database.
charts of ER, a technique for displaying the structure of the logical database for video can provide. This charts a simple way to form the video for the design of the database.Always, a picture is more eloquent than words, numerous and simple concept, and is understandably offers. Because of the universality of the model ER as a method in the design of the database, etc. charts, it is also arguably the will be.