MySQL is the most popular open-source database system.
What is MySQL?
MySQL is a database.The data in MySQL is stored in database objects called tables.
A table is a collection of related data entries and it consists of columns and rows.
Databases are useful when storing information categorically. A company may have a database with the following tables: "Employees", "Products", "Customers" and "Orders".
Database Tables
A database most often contains one or more tables. Each table is identified by a name (e.g. "Customers" or "Orders"). Tables contain records (rows) with data.Below is an example of a table called "Persons":
LastName | FirstName | Address | City |
---|---|---|---|
Hansen | Ola | Timoteivn 10 | Sandnes |
Svendson | Tove | Borgvn 23 | Sandnes |
Pettersen | Kari | Storgt 20 | Stavanger |
Queries
A query is a question or a request.With MySQL, we can query a database for specific information and have a recordset returned.
Look at the following query:
SELECT LastName FROM Persons
LastName |
---|
Hansen |
Svendson |
Pettersen |
Download MySQL Database
If you don't have a PHP server with a MySQL Database, you can download MySQL for free here: http://www.mysql.com/downloads/Facts About MySQL Database
One great thing about MySQL is that it can be scaled down to support embedded database applications. Perhaps it is because of this reputation that many people believe that MySQL can only handle small to medium-sized systems.The truth is that MySQL is the de-facto standard database for web sites that support huge volumes of both data and end users (like Friendster, Yahoo, Google).
Look at http://www.mysql.com/customers/ for an overview of companies using MySQL.
http://www.w3schools.com/php/php_mysql_intro.asp
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