Do you know the icons found in crow’s ft notation?

Entity-dating diagrams are a useful equipment to own design database. They show new entities inside it, their qualities, and also the relationships among them. You ought to establish such facets effectively understand the design of database ahead of building it.

A strategy will accustomed perform an entity-matchmaking diagram try crow’s base notation. Put from the seventies, brand new unique arrows used in crow’s legs notation are also named upside-down arrows, chicken base, or simply forks.

Cardinality and you may modality

Dating outlines during the crow’s ft notation enjoys a couple of indicators to explain the fresh new cardinality together with modality of your own relationships. Cardinality informs you maximum amount of moments you to a case from an organization are for the cases of others organization. Modality tells you minimal amount of moments that the such as can be in the instances of the other organization. Continue Reading