A database model that describes the attributes of entities and the relationships among them. An entity is a file (table). Today, ER models are often created graphically, and software converts the ...

This paper is an extension of previous work aimed at integrating ideas in the field of database systems with accounting theory. Unlike others, however, it does not propose use of a particular type of ...

To support a real page, your entity model is going to need multiple entities and associations between them. Here's how to add them. This column continues my exploration of both Dynamic Data and Entity ...

This course provides students with in-depth knowledge for modeling, designing, implementing, and managing database systems for operational and decision support purposes. Topics covered include ...

Occasionally one sees an entity-relationship diagram (ERD) having an unusual characteristic. The unusual element is an entity (or more than one) that seems to have a relationship with every other ...

At its heart, data modeling is about understanding how data flows through a system. Just as a map can help us understand a city’s layout, data modeling can help us understand the complexities of a ...

In relational databases, it is a field in one table that is indexed in another. Foreign keys provide the building blocks for relating tables. For example, in a customer order table, the salesperson ...

This is a preview. Log in through your library . Abstract The data definitions in the order entry modules of 12 wholesale distribution software packages were studied to determine whether (a) their ...