Transcript Chapter 15

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Chapter 15
Database Administration
Database Systems:
Design, Implementation, and Management,
Seventh Edition, Rob and Coronel
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In this chapter, you will learn:
• That data are a valuable business asset that
require careful management and how
databases play a critical role in an
organization
• That the introduction of a DBMS has
important technological, managerial, and
cultural organizational consequences
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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In this chapter, you will learn (continued):
• What the database administrator’s
managerial and technical roles are
• About several database administration tools
and strategies
• How various database administration
technical tasks are performed with Oracle
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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Data as a Corporate Asset
• Data are a valuable asset that require careful
management
• Data are a valuable resource that can
translate into information
• If the information is accurate and timely, it is
likely to trigger actions that enhance
company’s competitive position and generate
wealth
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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Data as a Corporate Asset (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Need for and Role of Databases
in an Organization
• Database’s predominant role is to support
managerial decision making at all levels in
the organization
• DBMS must provide tools that give each level
of management different view of data and
support required level of decision making
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Introduction of a Database:
Special Considerations
• Having computerized database management
system does not guarantee that data will be
properly used to provide best solutions
required by managers
• Introduction of a DBMS is likely to have a
profound impact, which might be positive or
negative, depending on how it is administered
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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Introduction of a Database:
Special Considerations (continued)
• Introduction of DBMS has three important
aspects:
– Technological-DBMS software and hardware
– Managerial-Administrative functions
– Cultural-Corporate resistance to change
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The Evolution of the Database
Administration Function
• Data administration has its roots in the old,
decentralized world of the file system
• Advent of DBMS and its shared view of data
produced new level of data management
sophistication and led DP department to evolve into
information systems (IS) department
• Data management became increasingly complex job,
thus leading to development of database
administration function
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Evolution of the Database
Administration Function (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Evolution of the Database
Administration Function (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Evolution of the Database
Administration Function (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Evolution of the Database
Administration Function (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Database Environment’s
Human Component
• Even most carefully crafted database system
cannot operate without human component
• Effective data administration requires both
technical and managerial skills
• DA must set data administration goals
• DBA is focal point for data/user interaction
• Need for diverse mix of skills
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Database Environment’s
Human Component (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Database Environment’s
Human Component (continued)
Database Systems: Design, Implementation, & Management, 7th Edition, Rob & Coronel
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The Database Environment’s
Human Component (continued)
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The DBA’s Managerial Role
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The DBA’s Technical Role
• Rooted in following areas of operation:
– Evaluating, selecting, and installing DBMS and related
utilities
– Designing and implementing databases and
applications
– Testing and evaluating databases and applications
– Operating DBMS, utilities, and applications
– Training and supporting users
– Maintaining DBMS, utilities, and applications
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The Data Dictionary
• Two main types of data dictionaries:
– Integrated
– Standalone
• Main function-Store description of all objects
that interact with database
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The Data Dictionary (continued)
• Possible to manage use and allocation of all
organization’s information, regardless of
whether it has roots in database data
• Metadata stored in data dictionary are often
basis for monitoring database use and
assignment of access rights to database
users
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CASE Tools
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CASE Tools (continued)
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Developing a Data
Administration Strategy
• Critical step for any organization is to ensure
its information system supports strategic
plans for each of the company’s business
areas
• Database administration strategy must not
conflict with information systems plans
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Developing a Database
Administration Strategy (continued)
• Information engineering
– Translates strategic company’s strategic goals
into data and applications that will help
company achieve those goals
– Output of IE process is information systems
architecture that serves as basis for planning,
development, and control of future information
systems
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Developing a Database
Administration Strategy (continued)
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