Guide to Oracle 10



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Guide to Oracle 10g

  • Chapter 1:
  • Client/Server Databases and the Oracle 10g Relational Database

Objectives

  • Guide to Oracle 10g
  • Develop an understanding of the purpose of database systems
  • Describe the purpose and contents of an entity-relationship model
  • Explain the steps in the normalization process
  • Describe the differences between personal and client/server databases

Introduction

  • Guide to Oracle 10g
  • If an organization needs to store and maintain a large amount of data that must be viewed and updated by many users at the same time, it often uses a client/server database such as Oracle 11g.

Database Systems

  • Guide to Oracle 10g
  • Data files consist of:
    • Fields
      • Describe characteristics
      • Also called columns
    • Records
      • Group of related fields

Database Systems (continued)

  • Guide to Oracle 10g
  • Problems with storing data in files:
    • Proliferation of data management programs
    • Presence of redundant data
    • Inconsistent data
  • Database
    • Stores all organizational data in central location
    • Eliminates redundant data to reduce possibility of inconsistent data

Database Systems (continued)

  • Guide to Oracle 10g
  • Database management system (DBMS)
    • Application that performs all routine data-handling operations
    • Provides central set of common functions for managing database
      • Inserting
      • Updating
      • Retrieving
      • Deleting data values

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