Beginning Database Design- P20 ppt

... 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

Ngày tải lên: 23/12/2013, 01:16

... 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

... attribute. Overview of Data Modeling and Database Design 8Ć29 Designing the Database The database design stage produces design specifications for a relational database, including definitions for relational ... the database. D Redefine integrity constraints. For more information, see Develop Complex Data Models and Design Databases course description. Overview of Data Modeling and D...

Ngày tải lên: 10/12/2013, 17:15

... the Database and Managing Performance Once AWR snapshots are taken and stored in the database, the Automatic Database Diagnostic feature uses the AWR data, as described in the “Automatic Database ... EM EM Database Control also offers a mechanism for fixing invalid database objects. Fig- ure 14.28 shows the Schema tab in EM Database Control. You can see various types of objects...

Ngày tải lên: 24/12/2013, 02:17

... some examples of what it is and is not. Module 6: Beginning Physical Design 196 Module 6: Beginning Physical Design 196 Module 6: Beginning Physical Design Examples of Physical ... have just learned and foreshadow what they will be learning. Module 6: Beginning Physical Design 207 Module 6: Beginning Physical Design 207 Activity 6.3: Determining a...

Ngày tải lên: 17/01/2014, 09:20

... important data in a database designed by someone who didn’t understand the basics of database design? e first five chapters of this book are devoted to the fundamental tasks of relational database design ... start developing great databases quickly. Recognizing Relational Data Structures is section introduces the following core relational database structures and concepts: Database...

Ngày tải lên: 12/02/2014, 12:20

... Name: Column Name Key Type Nulls/ Unique Sample Data Good Database Design Prevents • Unnecessary or forgotten data • Inflexibility for database re-sizing or modification • Poor data element specification • Poor database integration ... capability Tables, Relationships, Set Theory • The power of a relational database comes from its ability to relate significant data together • Data...

Ngày tải lên: 17/03/2014, 00:20

... the so-called macro time scale) from a database, then mapped to correspondent partial damage values and, finally, accumulated until a limit damage value is reached. The database is filled in before in ... distributed memory architecture [824] processes. Discrete message passing is basically needed only at the beginning as well as the end of a child process. This advantage is highly favorab...

Ngày tải lên: 01/07/2014, 11:20

... 474-475, 483 action, 413, 418, 421 alternate paths, 420 auto-generated, 379 backtracking in, 423 beginning point to end point, 418 conflict in, 413 elements, 421-425 failure in, 424 flow of, 411,

Ngày tải lên: 01/07/2014, 17:20