Where conceptual data modeling is used primarily for the envisioning requirements for your database, a logical data model is used to explore the entity types and their relationships to other entities. A physical data model is what we use to truly design traditional projects. The internal database schema design is helpful for an application developer to better understand the functionality of data oriented objects of a project and therefore important for this developer to know how best to program a business application that must interact with a complex business database. Suppose you want to extract specific data from a collection of data entities from an order entry system and have it organized in one logical platform such as tables or columns. For example, customers place orders on a specific Read more [...]