Chapter 5 Data and Databases

Practically every application stores data of some kind that is used for a variety of purposes. The application you use to make an online purchase stores data. Each time you visit a website a small amount of data called a cookie is stored on your computer. Your smartphone has all sorts of data about you stored on the smart-phone—and possibly in a remote computer. Any application that stores data can be called a database application.

Let’s begin by exploring data and information. These terms are used interchangeably but they’re not the same. Data is part of information. By itself, data is meaningless, but when associated with related data collectively, there is meaning: information. Seems like we’re splitting hairs? ...

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