c h a p t e r 7 MANAGING DATA RESOURCES 7.1 © 2002 by Prentice Hall LEARNING OBJECTIVES • COMPARE TRADITIONAL FILE ORGANIZATION & MANAGEMENT TECHNIQUES • DESCRIBE HOW DATABASE MANAGEMENT SYSTEM ORGANIZES INFORMATION * 7.2 © 2002 by Prentice Hall LEARNING OBJECTIVES • IDENTIFY TYPES OF DATABASE‚ PRINCIPLES OF DATABASE DESIGN • DISCUSS DATABASE TRENDS * 7.3 © 2002 by Prentice Hall MANAGEMENT CHALLENGES • TRADITIONAL DATA FILE ENVIRONMENT • DATABASE APPROACH TO DATA MANAGEMENT • CREATING
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different sources. (Points : 1) batch processing data redundancy data independence online processing 3. Duplicate data in multiple data files is called (Points : 1) data redundancy. data multiplication. data independence. data backups. 4. A DBMS (Points : 1) makes the physical database available for different logical views. makes the logical database available for different analytical views. makes the physical database available for different analytical views. makes the relational database
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databasesystem is an integrated collection of related files‚ along with the details of the interpretation of the data. A Data Base ManagementSystem is a software system or program that allows access to data contained in a database. The objective of the DBMS is to provide a convenient and effective method of defining‚ storing‚ and retrieving the information stored in the database. The database and databasemanagementsystems have become essential for managing business‚ governments‚ schools‚ universities
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SonicWALL TZ 215 Series FIR E WALL The highest-performing‚ most secure UTM firewall for small offices n High performance security engine Integrated intrusion prevention Advanced IPSec and SSL VPN Streamlined GUI and advanced management wizards Application intelligence‚ control and visualization Dual-band wireless Content/URL filtering Gateway Anti-Virus and Anti-Spyware Service Comprehensive Anti-Spam Service Multiple security zones WAN/ISP redundancy and failover Comprehensive centralized
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Software development process A software development process‚ also known as a software development life-cycle (SDLC)‚ is a structure imposed on the development of a software product. Similar terms include software life cycle and software process. It is often considered a subset of systems development life cycle. There are several models for such processes‚ each describing approaches to a variety of tasks or activities that take place during the process. Some people consider a life-cycle model a more
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high (20 dBm) and low power ( 20 dBm) extremities. Second‚ we fabricate our design on a printed circuit board to demonstrate how such a circuit can run a commercial Mica2 sensor mote‚ with accompanying simulations on both ideal and non-ideal conditions for identifying the upper bound on achievable efficiency. With a simple yet optimal dual-stage design‚ experiments and characterization plots reveal approximately 100% improvement over other existing designs in the power range of 20 to 7 dBm. Index Terms—Optimization
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this chapter‚ you will learn (continued): • About flaws in file system data management • What the database system’s main components are and how a database system differs from a file system • The main functions of a database management system (DBMS) Database Systems: Design‚ Implementation‚ & Management‚ 7th Edition‚ Rob & Coronel 3 1 Data vs. Information • Data: – Raw facts; building blocks of information – Unprocessed information • Information: – Data processed to reveal
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management system (DBMS) consists of software that operates databases‚ providing storage‚ access‚ security‚ backup and other facilities. Database management systems can be categorized according to the database model that they support‚ such as relational or XML‚ the type(s) of computer they support‚ such as a server cluster or a mobile phone‚ the query language(s) that access the database‚ such as SQL or XQuery‚ performance trade-offs‚ such as maximum scale or maximum speed or others. Some DBMS cover more
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integrated? 8. What does it mean that database is collection of logically related data? 9. What is DBMS? 10. What are the main categories of database languages? 11. What is view? 12. What is it created for? 13. What are the main benefits of views? 14. List the main generic components of DBMS. 15. What is system catalog? What is the main role of system catalog? 16. What are procedures of DBMS? 17. What kind of people roles do you know? What are they responsibilities? 18. What is the role
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DATA BASE SYSTEM Introduction Data is a virtual organizational resource which is an important input in an information system. This data resource is traditionally called the data base. It is from this data base that data is processed and converted into information to satisfy information needs of the organization. Nowadays we find that the internal and external information resources available to organizations are increasing at a rapid rate‚ due to which data bases are becoming larger and
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