July 2025
Beginner
768 pages
16h 54m
English
Content preview from PHP, MySQL, & JavaScript All-In-One For Dummies, 2nd Edition
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Chapter 4
Using the Database
IN THIS CHAPTER
Adding new data to your tables
Updating existing data in your tables
Finding data quickly
Working with backups and restores
The preceding chapter covers how to create databases and tables for your dynamic web application. That’s all well and good, but databases and tables don’t really do anything until you start placing data in them.
This chapter explores the different methods you have available for adding, changing, and removing data in your application tables. After that, it walks through possibly the most important feature of any database: how to quickly retrieve the data that your application needs. The chapter closes by discussing the important jobs of backing up and restoring database data.
Working with Data
The ability to easily manage application data is the whole reason dynamic web applications use databases. So it stands to reason that the SQL language has quite a few options for working with data. There are four basic functions that you need to do with the data in your application:
- Create new data records to tables.
- Read ...
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