Installing and Using MySQL and phpMyAdmin

Last Time... Installing Apache server Installing PHP Running basic PHP scripts on the server Not necessary to have Apache and PHP working to understand this webcast, but we will be putting everything together next week!

Today... Installing MySQL server on your computer (easy!) Installing phpMyAdmin (not quite as easy, but still not too bad) All about MySQL queries

Download and Install MySQL Get an msi installer from this page: “Standard installation” with default settings should work just fine. Be sure to remember your password!

Command Line Client Open the Command Line Client. Try typing the command “show databases.” This is what you’ll see:

Creating a Database Make up a name for your first database and try the command “create database databasename.”

Creating a Table Type “use databasename;” to switch to your database. Use the command “create table tablename (fields)” to make a table in your database. To make an integer field, say “fieldname integer” in the parentheses. To make a text field, say “fieldname char(20)” (this makes a field where the maximum number of characters is 20- you can make a different limit if you’d like).

Adding Data Use the command “insert into tablename (fieldnames) values (values)” to add data to the table. Use ‘single quotes’ around text. You can add multiple entries at a time (see the example below).

Retrieving Data Type “select fieldname from tablename” to see the information in the table. Use a comma-separated list to view multiple columns in the table. Use a * to see all columns.

Using “where” (as well as “and”, “or”, “not”)

Delete “Delete” works just like “select.” Use with caution.

Multiple Tables You can create many tables within the same database. A common practice is to use ID numbers to reference information from other tables.

Multiple Tables You can create many tables within the same database. A common practice is to use ID numbers to reference information from other tables.

Join Queries Queries can use more than one table. The first query shows which names are paired with which books. “select addresses.name, books.book from addresses, books where addresses.ID = books.person;” Challenge: write a query that picks out the addresses of people who like Lord of the Rings.

More Examples Try to write queries to display the following information: - One column: just all the addresses - Two columns: names and corresponding favorite bands - One column: people who liked The Beatles also liked which books?

Installing phpMyAdmin phpMyAdmin provides a useful GUI so we don’t have to use the command line all the time Download phpMyAdmin at wnloads.php Extract the files into a folder named “phpMyAdmin” in your Apache server folder

Before editing config file... Go to localhost/phpmadmin/index.php You should see the phpMyAdmin login page, but with error messages. You might not be able to login yet.

Editing the Config File Find config.sample.inc.php in your phpMyAdmin folder. Find the line that says $cfg['blowfish_secret'] = ''; /* YOU MUST FILL IN THIS FOR COOKIE AUTH! */ Put any word you want into the quotes, (i.e. $cfg['blowfish_secret'] = ‘caddywhompus’

Some Housekeeping Add the Multi-Byte String and Mcrypt extensions to PHP if you haven’t already. –To do this, go to Control Panel -> Uninstall Programs, select PHP, and click “Change.” The PHP installation wizard will come up. Select the Multi-Byte String and Mcrypt extensions this time. Copy the file libmcrypt.dll to the Windows\System32 directory Restart Windows

Logging in Now go back to localhost/phpMyAdmin/index.php You should be able to login using username ‘root’ and the password you made when you installed MySQL. If you have problems on a Windows OS earlier than Windows 7, this site might help: phpMyAdmin-on-Your-Windows-PC

phpMyAdmin Features Create a Table

Add data

Browse

Search

Any Query

So Why Learn About the Command Line? In some cases, using the command line is faster We need to know how to write MySQL queries in order to make webpages that interact with our MySQL database.

Suggestions for this week: –Install MySQL and phpMyAdmin –Play around with making databases Next Time: –HTML and PHP code we need to make the database work with our website

Useful Links MySQL download: phpMyAdmin download: mySQL command line commands: Getting phpMyAdmin to work on Windows: phpMyAdmin-on-Your-Windows-PC