|
MySQL is the most popular open source database server.
What is MySQL
MySQL is a database. A database defines a structure for storing information.
In a database, there are tables. Just like HTML tables, database tables
contain rows, columns, and cells.
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 has a name
(e.g. "Customers" or "Orders"). Each table contains 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 |
The table above contains three records (one for each person) and four columns
(LastName, FirstName, Address, and City).
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
|
The query above selects all the data in the LastName column in the Persons
table, and will return a recordset like this:
| 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/index.html
MySQL Database Tutorial
[MySQL Tutorial] [MySQL Connect] [MySQL Create] [MySQL Insert] [MySQL Select] [MySQL Where] [MySQL Order By] [MySQL Update] [MySQL Delete]
| 
