Beginning Database Design- P17 potx

... ❑ The database model is the backbone of any application that uses data of any kind. That data is most likely stored in some kind of database. That database is likely to be a relational database ... top for this particular database model. Figure 10-25: The online auction house OLTP database model, 3NF, partially denormalized. The only obvious issue still with the database model a...

Ngày tải lên: 03/07/2014, 01:20

... 7 Hierarchical Database Model 8 Network Database Model 8 Relational Database Model 9 Relational Database Management System 11 The History of the Relational Database Model 11 Object Database Model ... Model 12 Object-Relational Database Model 14 Examining the Types of Databases 14 Transactional Databases 15 Decision Support Databases 15 Hybrid Databases 16 Understanding Database...

Ngày tải lên: 03/07/2014, 01:20

... relational database model, and the object database model. In addition, a brief description covered star schemas. This chapter delves deeply into the details of the database warehouse database model. Expanding ... the Object Model Many modern relational databases are, in fact, object-relational databases. An object-relational database is by definition a relational database allowing...

Ngày tải lên: 03/07/2014, 01:20

... brands, 125–126 structure change, 127 database block, 407 database concept, 4–5 database event, 27, 418 database model application, 3, 5–6 decision support databases, 15–16, 407 defined, 3, 407 design importance, ... handled by object database model, 13 database model, 5–6 defined, 3, 404 dependence, minimizing to accommodate changes, 19 as latest evolution of database modeling...

Ngày tải lên: 03/07/2014, 01:20

... guilty. Mishandling Keywords and Categories A common problem in database design is the failure to properly deal with keywords and categories. Many database applications involve data that is categorized ... exists that needs to be understood before any design of a database should proceed further. As you have seen in the previous chapters, databases are often set up to solve one immedia...

Ngày tải lên: 28/03/2014, 09:20

... Microsoft Access database, dBase database, Oracle Database, MySQL, Ingres, or any relational database — it doesn’t matter. All of the coding in this book is written intentionally to be non -database specific, ... Building Fast-Performing Database Models 193 The Needs of Different Database Models 194 Factors Affecting OLTP Database Model Tuning 194 Factors Affecting Client-Server...

Ngày tải lên: 10/04/2014, 09:05

... of a database model ❑ The evolution of database modeling ❑ The hierarchical and network database models ❑ The relational database model ❑ The object and object-relational database models ❑ Database ... Database design objectives ❑ Database design methods Grasping the Concept of a Database A database is a collection of information— preferably related information and prefera...

Ngày tải lên: 03/07/2014, 01:20

... for you. 06_574906 ch02.qxd 10/28/05 11:36 PM Page 23 databases. The OLTP database is the source database because the OLTP database is the database where all the transactional information in the ... differences between a database, a database model, and an application ❑ The hierarchical and network database models ❑ The relational database model ❑ The object and object-relationa...

Ngày tải lên: 03/07/2014, 01:20

... multiple types of databases, using different database engines, perhaps even including legacy databases, and really any type of database that can be catered for with whichever database is being ... Legacy Databases Converting legacy databases can often be the most difficult of tasks. Sometimes the databases are partially inaccessible or difficult to access at best. Sometimes the databas...

Ngày tải lên: 03/07/2014, 01:20

... within relational databases that some database engines allow and some do not. It is important to know that specialized objects exist as options for expansion to a relational database model, as ... relationships Keys are used to identify and ultimately retrieve records from a database at a later date. Understanding Keys Relational databases use the terms index and key to indicate simila...

Ngày tải lên: 03/07/2014, 01:20