Beginning Database Design- P18 doc

... online auction house data warehouse database model. These field refined field changes are all duplicated from the OLTP database model, to the database warehouse database model. Field refinements ... Design 17_574906 ch11.qxd 10/28/05 11:38 PM Page 323 ❑ XML Documents— Some databases allow structured storage of XML documents where the XML Document Object Model (DOM) is actively availab...

Ngày tải lên: 03/07/2014, 01:20

... databases, surrogate keys are possibly more important in terms of gluing together different data, even from different databases, perhaps even different database engines. Sometimes different databases ... data warehouse database simply cannot cope using a standard OLTP database relational database model. Something else is needed for a data warehouse. 173 Understanding Data Warehouse D...

Ngày tải lên: 03/07/2014, 01:20

... usually dependent on the database model. Analysis is planning. It is doubly important to plan for a database model. The reason is that the database model forms the basis of all database- driven applications, ... better a database model and product will ultimately be produced. Some database modeling and design tools allow generation of table scripts into different database engine...

Ngày tải lên: 03/07/2014, 01:20

... go overboard with normalization for an OLTP database model. ❑ Don’t be afraid to denormalize, even in an OLTP database model. ❑ Generally, an OLTP database model is normalized and a data warehouse ... each database model is usually secondary, and usually as a result of going too far initially, in the opposite direction. ❑ An OLTP database model should be normalized and a data wareho...

Ngày tải lên: 03/07/2014, 01:20

... relational database model is very good. Object-relational database model —The object-relational database model includes minimal aspects of the object database model into the relational database ... from a primary or master database, out to a number of other copies of the master database. Those copies can be fully dependent slave databases, or even other master databases, capable o...

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