'Strong entity' presentation slideshows

Chapter Four Database Design (Relational)

Chapter Four Database Design (Relational). Objectives Summary Keys (Constraints) Relational DBMS Normal Forms. Summary. DB Lifecycle Business Requirements Design (ER) Build DB Production Architecture of DBMS Definitions Data Models Database Design (ER Model) Strong Entity

827 views • 68 slides

Chapter 3: Modeling Data in the Organization

Chapter 3: Modeling Data in the Organization. ? : ? 11 ?? Chapter 2. ????? ???????. Business Rules. Statements that define or constrain some aspect of the business ??????? : Ex. ????????????? 30 ?? Control/influence business behavior ??????? Ex. ????????

428 views • 42 slides

Chapter 3: Modeling Data in the Organization

Chapter 3: Modeling Data in the Organization. ? : ? 11 ?? Chapter 2. ????? ???????. Business Rules. Statements that define or constrain some aspect of the business ??????? : Ex. ????????????? 30 ?? Control/influence business behavior ??????? Ex. ????????

426 views • 42 slides

Week 8 October 19

432 views • 42 slides

Chapter 3: Modeling Data in the Organization

Chapter 3: Modeling Data in the Organization. ? : ? 11 ?? Chapter 2. ????? ???????. Business Rules. Statements that define or constrain some aspect of the business ??????? : Ex. ????????????? 30 ?? Control/influence business behavior ??????? Ex. ????????

425 views • 42 slides

Chapter 3: Modeling Data in the Organization

403 views • 40 slides

Weak Entity Sets

Weak Entity Sets. A weak entity is an entity that cannot exist in a database unless another type of entity also exists in that database. Weak entity meets two conditions Existence-dependent Cannot exist without entity with which it has a relationship

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Remember

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Using ER/Studio

Using ER/Studio. Modeling a Relational Database Using ER Studio. We will use ER Studio as the modeling Tool to build ER diagrams. ER Studio Supports the system catalog concept as well as recording information needed to support the data dictionary

424 views • 19 slides

CSC 3800 Database Management Systems

CSC 3800 Database Management Systems. Fall 2009. Time: 1:30 to 2:20. Meeting Days: MWF. Location: Oxendine 1237B. Textbook : Databases Illuminated , Author: Catherine M. Ricardo, 2004, Jones & Bartlett Publishers. Chapter 3 The Entity Relationship Model. Dr. Chuck Lillie.

369 views • 16 slides

Entity Relationship Model

Entity Relationship Model. Introduction:- The E-R model was introduced by P.P. Chen not only E-R model but also corresponding diagramming techniques. In a database management system (DBMS), a group of similar information or data, which is of interest to an organization is called an entity.

718 views • 11 slides