Book Image

Turning Spreadsheets into Corporate Data

By : Bill Inmon
Book Image

Turning Spreadsheets into Corporate Data

By: Bill Inmon

Overview of this book

Spreadsheets are a popular way to store and communicate business data, but, although they are easy to create and update, they are not reliable enough to be used for making important corporate decisions. With this book, you can gain insight into how to maintain spreadsheets, how to format them, and then convert them into a database of reliable and useful information. Turning Spreadsheets into Corporate Data starts with a quick history of spreadsheet usage. You’ll learn the basics of formatting spreadsheets, including how to handle special characters and column headings, and how to convert the spreadsheet first into an intermediate database and then into corporate data. You will also learn how to utilize the mnemonic dictionary that is created along with the intermediate database. The later chapters discuss the immutability of data and the importance of organizational and political considerations during the data transformation. By the end of this book, you’ll have the skills and knowledge needed to convert your spreadsheets into reliable corporate data.
Table of Contents (16 chapters)
Free Chapter
1
Introduction
14
13: Case Study
15
Glossary
16
Index

The Data Item Set

Each subject area has its own subset of more detailed information. This more detailed description of the subject area can be depicted in a separate diagram called a data item set, or DIS. The DIS describes in much greater detail the characteristics of the entity that it portrays. Some of the things found in the DIS include:

  • The key, or major identifier of data for the subject area
  • Attributes about each subject area
  • Grouping of the attributes
  • Foreign keys, or relationships to other subject areas

Figure 12.2 on the next page shows a DIS.