For the most part, recipes in earlier chapters have used single tables. But for any application of even moderate complexity, it's likely that you'll need to use multiple tables. Some queries simply cannot be answered using a single table, and the real power of a relational database comes into play when you start to relate the information in tables to each other. There are several reasons to use multiple tables:

  • To combine records from tables to obtain more comprehensive information than can be obtained from individual tables alone
  • To hold intermediate results for a multiple-stage operation
  • To insert, delete, or update records in one table based on information in another

When you use multiple tables, they may come from the same database or from different databases. On occasion, you may even need to use tables that come from databases hosted by different MySQL servers. For the first two cases, you'll need to know how to refer to columns from the different tables, which may involve using table aliases or qualifying table names with a database name. In the third case, you'll need to open a connection to each server and relate the information from them yourself.

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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