What is ERD

 The ERD,

It normally alluded concerning an element relationship chart, is only a graphical depiction of the connections that exist between people, things, areas, ideas, as well as activities within a data and innovation (IT) framework. An ERD utilizes data set demonstrating procedures to aid the production of business exercises and as the foundation for a data set motor(Biscobing, september 2019; Biscobing, september 2019).

ERD related items

Entities - generally depicted in such a rectangle, entities might be items, people, thoughts, or situations that keep the data (moqups).

Attributes - represented in a round as well as an oval, attributes allude to an individual's qualities. It could be basic, mixed, or generated, and an entity may have 1 or more properties (moqups).

Relationships show how a group of individuals engage with one another. These are presented as tags mostly on connections that link the items (moqups)

Cardinality in data set plan has more to do with going to count columns but rather values Thus there are 3 basic notions of cardinality. It might be related to adding the number of items in a set, recognizing the relationships across tables, or representing how real data tables have certain characteristics and how these tables look like collectively. (Becker, 14 August 2020)

Reference 

Becker, R. (14 August 2020). cardinality . techopedia.

moqups. (n.d.). ERD Templates and Examples. moqups.

Biscobing, J. (september 2019). Entity Relationship Diagram (ERD). techtarget.