Database Systems: Design, Implementation, and Management



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Database systems and benefits

In this chapter, you will learn:

  • Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

Data versus Information

  • Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel
    • Data constitute building blocks of information
    • Data is processed to produce information
    • Information reveals meaning of data
    • Information is a valuable resource
    • Information is basis for knowledge
    • Good, timely, relevant information is critical to decision making
    • Good decision making is key to organizational survival
  • Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel
  • Data-Information-Decision Cycle
  • Figure 16.1

Database Management

  • Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel
  • A database is a shared, integrated computer structure containing:
    • Application (or end user) data
    • Metadata (data about data, eg. datatype, length, required/not required, validation, …)
  • Database Management System (DBMS)
    • Manages Database structure
    • Controls access to data
    • Provides query language

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