Monday, October 14, 2013

Entity Relationship Modeling

ch03_4770 4/4/07 12:09 PM Page 33 CHAPTER three Entity- family Modeling chapterE W OVERVI 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20 3.21 3.22 entryway The Entity-Relationship Model Entity Attributes Relationships breaker point of a Relationship Cardinality of a Relationship Unary Relationship Binary Relationship Ternary Relationships Attributes of Relationships Associative Entities jerry-built Entity Types deepen Entity-Relationship Modeling Superclass, Subclass, and Relationships Generalization and Specialization Process Participation and disjoin Constraints Superclass/Subclass Hierarchy cast Study: Conceptual Design for University Database In-Class identification Summary Exercises 33 ch03_4770 4/4/07 12:09 PM 34 Page 34 CHAPTER 3 3.1 ? Entity-Relationship Modeling Introduction In Chapter 2, we introduced entropy imitates. A data model is an combine collection of concepts that represents real world objects, events, and their relationships. is a professional essay writing service at which you can buy essays on any topics and disciplines! All custom essays are written by professional writers!
We also concisely discussed dickens types of data models: object-based data models and relation-based data models. It is a common make in database anatomy to develop an object-based model first and whence to systematically transmute the model into a relation-based model, which is more capable for database implementation. In this chapter, we depart focus on conceptual database founding using object-based models. In Chapter 4, we will discuss the relational data models. The three rough ly customary object-based models discussed ! in database literature are the entityrelationship model, the functional model, and the object-oriented model. The entity-relationship model has emerged as one of the most popular techniques in the design of databases due to its inherent advantages. The entity-relationship (E-R) model is well-fixed to learn, yet goodly enough to model complex, real-world scenarios. We have...If you want to cast down a full essay, fix up it on our website:

If you want to get a full essay, visit our page: write my paper

No comments:

Post a Comment