Using Patterns to Match Broad Content Types

10.24.1 Problem

You want to classify values into broad categories.

10.24.2 Solution

Use a pattern that is similarly broad.

10.24.3 Discussion

If you need to know only whether values are empty, nonempty, or consist only of certain types of characters, patterns such as the following may suffice:


Type of value the pattern matches


Empty value


Nonempty value


Whitespace, possibly empty


Nonempty whitespace


Nonempty, and not just whitespace


Digits only, nonempty


Alphabetic characters only (case insensitive), nonempty


Alphanumeric or underscore characters only, nonempty

Using the mysql Client Program

Writing MySQL-Based Programs

Record Selection Techniques

Working with Strings

Working with Dates and Times

Sorting Query Results

Generating Summaries

Modifying Tables with ALTER TABLE

Obtaining and Using Metadata

Importing and Exporting Data

Generating and Using Sequences

Using Multiple Tables

Statistical Techniques

Handling Duplicates

Performing Transactions

Introduction to MySQL on the Web

Incorporating Query Resultsinto Web Pages

Processing Web Input with MySQL

Using MySQL-Based Web Session Management

Appendix A. Obtaining MySQL Software

Appendix B. JSP and Tomcat Primer

Appendix C. References

MySQL Cookbook
MySQL Cookbook
ISBN: 059652708X
EAN: 2147483647
Year: 2005
Pages: 412
Authors: Paul DuBois © 2008-2020.
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