Read e-book online Absolute Beginner s Guide to Databases PDF

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By John Petersen

ISBN-10: 078972569X

ISBN-13: 9780789725691

Absolute Beginner's advisor to Databases brings the weather of a database jointly utilizing effortless to appreciate language, ideal for the real newbie. It not just supplies particular fingers on perform, but in addition presents an outline of designing, conserving and utilizing a database. This e-book covers what databases are used for, why databases are vital, why the layout of the database is critical, database normalization, keys to good database layout, adjustments in kinds of databases, and indexes--what they're, how we use them, and why they're very important.

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16 The Products by Category query in Datalist View. It should be clear to you how useful queries can be. The Datalist View, however, is not very useful to an end user. This is where reports come in. With a report, you can build a layout that makes the data easier to view and is more useful to the end user. Queries gather data together from one or more tables, and reports provide a useful format for viewing the data. 17 demonstrates how a report brings a query to life. 17 The Products by Category report in Print Preview View.

Input Mask The Input Mask property provides a mechanism for making data entry easier. For example, with a telephone number, an input mask of (____) - ____ ____ makes entering the various components of a phone number easier. Access provides a wizard to create values for this property. Caption The Caption property specifies the contents of the descriptive label that is used on a form or report in which the field is used. The Caption property also specifies the contents of the column header for a field in the Datalist View.

To make the tactical decisions previously listed, a database must provide the required information in a usable format. Through interviews, you can learn much about what a company hopes to achieve, and in the process, learn what the requirements of the database need to be. Business Forms and Documents Interviews can provide both high-level and detail-oriented information. Examining and analyzing business forms is where you start to get into the nitty-gritty details. The following are examples of business forms: ■ Invoices ■ Reports ■ Shipping documents CHAPTER 3 AN INTRODUCTION TO DATABASE DESIGN 49 ■ Timesheets ■ Customer service surveys ■ Any other piece of paper somebody in the business uses In an interview, you might discover that it is critical the database stores information about customers.

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Absolute Beginner s Guide to Databases by John Petersen

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