Free Trial

Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.

  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

CHAPTER 2: Guided Tour of the Development Process

CHAPTER 2

Guided Tour of the Development
Process

The decision to set up a small database usually arises because there is some specific task in mind: a scientist may have some experimental results that need safekeeping; a small business may wish to produce invoices and monthly statements for its customers; a sports club may want to keep track of teams and subscriptions.

The important thing is not to focus solely on the immediate task at hand but to try to understand the data that is going to support that task and other likely tasks. This is sometimes referred to as data independence. In general, the fundamental data items (names, amounts, dates) that you keep for a problem will change very little over a long time. The values will of course be constantly changing but not the fact that we are keeping values for names, amounts, and dates. What you do with these pieces of data is likely to change quite often. Designing a database to reflect the type of data involved, rather than what you currently think is the main use for the data, will be more advantageous in the long term.


  

You are currently reading a PREVIEW of this book.

                                                                                                                    

Get instant access to over $1 million worth of books and videos.

  

Start a Free 10-Day Trial


  
  • Safari Books Online
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint