This latest edition of the best-selling implementation guide to the Structured Query Language teaches SQL fundamentals while providing practical solutions for critical business applications. The Practical SQL Handbook, Fourth Edition now includes expanded platform SQL coverage and extensive real-world examples based on feedback from actual SQL users.
The Practical SQL Handbook begins with a step-by-step introduction to SQL basics and examines the issues involved in designing SQL-based database applications. It fully explores SQL s most popular implementations from industry leaders, Oracle, Microsoft, Sybase, and Informix.
Highlights include:
A bonus CD-ROM contains a time-limited, full-feature version of the Sybase® Adaptive Server Anywhere™ software as well as the sample database, scripts, and examples included in the book.
The Practical SQL Handbook is the most complete reference available for day-to-day SQL implementations.
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Despite vendor-specific differences, there is a general, industry-wide core of SQL commands that all users need to understand. Adopting standards doesn't happen overnight; it is a long process. At any point, vendors will have varying levels of conformance and will continue to produce vendor-specific variations. This book aims to give SQL users a mastery of the fundamentals of the language, with a side glance at the specifics of particular implementations.
Changes for Recent Editions The changes for recent editions have been in three areas: to include more real-world examples to emphasize the SQL-92 features that most vendors have implemented to provide software for hands-on practice.
More Real-World Examples In talking to new and developing SQL users, we heard over and over of their need for more examples to follow, change, narrow, and broaden. Accordingly, the bulk of the added material in the second edition consisted of code "recipes." Chapter 11, "Solving Business Problems," is a selection of code samples based on questions and answers that came over popular computer newsgroups. We reproduce interesting problems and solutions in terms of the sample bookbiz database used throughout the book. The chapter includes examples of using the CASE function for conditional logic, formatting results, and finding date data. A few samples fall into a different category. They aren't so much solutions to problems as indications of common errors. They include issues with DISTINCT and misunderstandings of what SQL can do.
Emphasize SQL-92 With the third edition, we revised the book to incorporate the SQL-92 features that most vendors have adopted. These include new datatypes, additions to the CREATE TABLE statement that allow built-in integrity constraints, modifications to the ORDER BY and GROUP BY clauses, the new escape character for the LIKE keyword, and changes to GRANT and REVOKE, among others.
Provide Software for Hands-On Practice With the fully-usable trial version of Sybase's Adaptive Server Anywhere on the CD that accompanies this book, you can run the examples (and your variants) on a PC. We've always felt that the secret to learning SQL is practice. Now you can experiment to your heart's content, trying out code samples with data you know and checking the results to see if they are what you expect. When you're stumped by complicated code, break it into small, meaningful pieces and run them separately to make sure you understand what each segment does. Then put them together in increasingly complex combinations--and have fun! The Sybase Adaptive Server Anywhere software on the CD is a 60-day full-feature version that allows you to create objects as well as query existing ones. ASA is built with an updated version of the bookbiz database: for the fourth edition, we increased book prices and made dates more recent. Also included on the CD are scripts to create the database on ASA (in case you damage the original) and on the other systems discussed in the book.
The Fourth Edition The Practical SQL Handbook fourth edition continues to focus on industry-practice SQL, but the information included is at once more general and more specific than earlier editions. For the fourth edition, we had two objectives: to expand our test base, running the examples on five different database systems to include examples showing vendor-specific differences among systems
Test on More Systems For the fourth edition, all examples were run on five systems (Sybase Adaptive Server Anywhere and Adaptive Server Enterprise, Microsoft SQL Server, Oracle, Informix), rather than on Sybase systems only, as in the third edition. This expanded test base makes the information more universal. We are no longer limited to what we can explore or verify on a particular system. If an important feature doesn't exist on Adaptive Server Anywhere (ASA, the RDBMS included on the CD), we can show code and results from Oracle or SQL Server.
Show Examples of Vendor-Specific Differences On the other hand, this edition is more specific. It includes information on specific idiosyncrasies of the five SQL dialects, warning readers where to look for differences. In this, it reflects the real world---lots of database users are working with multiple systems, either sequentially or simultaneously. Interesting SQL differences are flagged as SQL Variants, in-text sections that show details on how single and double quotes are used by different vendors, or users added, or outer joins specified. You won't see code for every one of the five systems every time, but you'll get an introduction to the kind of differences that are likely in a particular area.
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Judith S. Bowman has been a database professional since the early 1980s. She is currently an independent consultant specializing in SQL and relational database issues and is the author of Practical SQL: The Sequel (Addison-Wesley, 2001). Sandra L. Emerson is an independent consultant and former Vice President of Publishing Programs for Sybase. Marcy Darnovsky, teaches at colleges throughout the San Francisco Bay area. She was formerly at Sybase.
0201703092AB04062001
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