matter
TRANSCRIPT
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Database AdministrationChapter 15
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In this chapter, you will learn:
That data are a valuable business asset that requires careful management
Why and how the database plays a critical role in an organization
That the introduction of a DBMS has important technological, managerial, and cultural organizational consequences
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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
About various database administration strategies
How various database administration technical tasks are performed with Oracle
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Data as a Corporate Asset
Data are accepted as a valuable asset requiring careful management
Data are now well understood as a valuable resource to be translated into information
If information is accurate and timely, its use is likely to enhance company’s competitive position and generate wealth
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Fig 15.1 The Data-Information-Decision-Making Cycle
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The Need for and Role of Databasesin 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 a different view of the data and support required level of decision making
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Introduction of a Database: Special Considerations Having a computerized database
management system does not guarantee that the data will be properly used to provide best solutions required by managers
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Introduction of a Database: Special Considerations (continued)
Introduction of a DBMS is likely to have a profound impact, which might be positive or negative, depending on how it is administered
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 the DBMS and its shared view of data produced a new level of data management sophistication and led the DP department to evolve into an information systems (IS) department
Data management became an increasingly complex job, thus leading to development of the database administration function
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The IS Department Internal Organization
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The Placement of the DBA Function
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A DBA Functional Organization
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Multiple Database Administrators in an Organization
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The Database Environment’s Human Component
Even the most carefully crafted database system cannot operate without a human component
Effective data administration requires both technical and managerial skills
DA must set data administration goals DBA is the focal point for data/user
interaction Need for diverse mix of skills
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Contrasting DA and DBA Activities and Characteristics
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A Summary of DBA Activities
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Desired DBA Skills
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DBA Activities and Services
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Database Administration Tools
Two main types of data dictionaries:
Integrated
Standalone
Main function: store description of all objects that interact with the database
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Database Administration Tools (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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An Example of a CASE Tool: Visio Professional
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Developing a Database 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 goals into the data and applications that will help company achieve those goals
Output of the IE process is an information systems architecture that serves as basis for planning, development, and control of future information systems
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Forces Affecting the Development of the ISA
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The DBA at Work: Using Oracle for Database Administration Execution of tasks tends to be
DBMS-and operating-system specific
Brief introduction to the way some typical DBA tasks would be performed in Oracle
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The Oracle Enterprise Manager Interface
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Oracle Edit Local Preferred Credentials Window
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Oracle RDBMS Services
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The Oracle Storage Manager
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Creating a New Tablespace
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The Oracle Schema Manager
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The Oracle Security Manager
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The Create User Dialog Box
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The Oracle Instance Manager
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Creating a New Database with the Database Configuration Assistant
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Selecting the New Database Template
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Naming the Database
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Selecting the Database Operation Mode
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Specifying Initialization Parameters
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Specifying Storage Parameters
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Database Creation Options
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Summary of Database Creation Options
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Database Creation Progress
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Summary Data management is critical for any
organization Data should be treated as corporate asset
with monetary value DBMS is most commonly used electronic tool
for corporate data management Impact of the DBMS on the organization’s
managerial and cultural framework must be carefully examined
Data administration function was developed in response to changes in data management fostered by technological advances in computer systems
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Summary (continued) Database administrator (DBA) is responsible
for corporate database management Broader data management activity is handled
by data administrator (DA) DA is more managerially oriented than the
more technically oriented DBA Development of data administration strategy
is closely related to the company’s mission and objectives
Implementing the overall company strategy is a crucial process influenced by managerial, technological, and cultural issues