tailieunhanh - Hướng dẫn sử dụng MySQL part 2

Lớn các cửa hàng máy tính của công ty đã được sử dụng các sản phẩm cơ sở dữ liệu phức tạp và tốn kém trong nhiều năm. Những đầy đủ tính năng, hệ thống phần mềm tối ưu hóa mạnh là cách duy nhất cho một tổ chức lớn để quản lý lượng của thông tin doanh nghiệp. | DRAFT 8 17 01 2 Introduction to Relational Databases Large corporate computing shops have been using complex and expensive database products for years. These full-featured heavily optimized software systems are the only way for a big organization to manage its volumes of corporate information. Home computer users haven t traditionally needed database products at all. They house their data addresses to-do lists etc. on their systems in small files or in specialized off-the-shelf spreadsheet and phonebook applications. A new category of computer users who fall between these two extremes has come into play. These persons maintain moderate-sized information sets required for small organizations such as new businesses or nonprofit organizations. Alternatively such users may be a geographically isolated part of a larger company. Or they be individuals interested in maintaining complex personal data such as a list of songs from favorite bands that can be served up on a personal web page. If you are the kind of person who wants a database who is willing to do some work to set one up but who does not want to spend six figures on a product and a fleet of programmers to maintain it this book is for you. This book introduces you to the world of small-scale database development through one popular database product MySQL. We start by introducing you to relational databases and MySQL. We then proceed to show you how to get up and running with MySQL and how to administer it. The rest of the book covers the use of MySQL to design build and support the type of applications important to users like you. What Is a Database A database is simply put a collection of data. An example of a non-electronic database is the public library. The library stores books periodicals and other documents. When you need to locate some data at the library you search through the card catalog or the periodicals index or maybe you even ask the librarian. Another similar example is the unsorted Copyright 2001