MySQL Inner Join Tutorial

MySQL Inner Join Tutorial
- Download source code
- Requirement(s): PHP Server, MySQL

config.php:

<?php
//MySQL Configuration
//DB Host (Normally 'localhost')
$dbhost = 'localhost';
//DB Database Username
$dbusername = 'root';
//DB Database User Password
$dbpassword = 'mypassword';
//DB Database Name
$dbname = 'mydbname';
//mysql_connect function
$conn=mysql_connect($dbhost, $dbusername, $dbpassword);
if(!$conn) :
   die('Could not connect: ' . mysql_error());
endif;
$db=mysql_select_db($dbname, $conn);
if(!$db) :
   die ('Cant connect to database : ' . mysql_error());
endif;
?>

install.php:

<?php
//make a MySQL connection
include('config.php');
//create a MySQL table in the selected database
mysql_query("CREATE TABLE `text` (
  `textid` int(11) NOT NULL auto_increment,
  `textvalue` text collate utf8_unicode_ci,
   PRIMARY KEY  (`textid`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
COLLATE=utf8_unicode_ci AUTO_INCREMENT=1"
)
or die(mysql_error());
mysql_query("CREATE TABLE `numbers` (
  `numberid` int(11) NOT NULL auto_increment,
  `numbervalue` text collate utf8_unicode_ci,
   PRIMARY KEY  (`numberid`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
COLLATE=utf8_unicode_ci AUTO_INCREMENT=1"
)
or die(mysql_error());
?>

index.php:

<title>Index Page</title>
<center><h2>INDEX</h2></center><BR>
<?php
//make a MySQL connection
include('config.php');
echo " <a href=\"insert.php\">Insert PHP</a><br>";
//Get data from 2 tables
//*=select everything from table
$result = mysql_query("SELECT * FROM text
INNER JOIN numbers
ON numbers.numberid = text.textid"
)
or die(mysql_error());
while($link=mysql_fetch_array($result)){
//echo (display) a link using $link
echo $link['numbervalue'];
echo "-";
echo $link['textvalue'];
echo "<br>";
}
?>

insert.php:

<title>Insert Page</title>
<center><h2>Insert Page</h2></center><BR>
<?php
//make a MySQL connection
include('config.php');
//to check if a submit button was clicked, use this...
if(isset($_POST['submit']))
{
$textvalue = $_POST['textvalue'];
$numbervalue = $_POST['numbervalue'];
//The INSERT INTO statement is used to add new records
//to a database table.
mysql_query("INSERT INTO text (textvalue)
VALUES ('$textvalue')"
)
or die(mysql_error());  
mysql_query("INSERT INTO numbers (numbervalue)
VALUES ('$numbervalue')"
)
or die(mysql_error());  
}else{
?>
<table><tr><td>
<form method="post" action="insert.php">
Textvalue:
</td><td>
<input name="textvalue" size="60" maxlength="255">
</td></tr>
<tr><td>
Numbervalue:
</td><td>
<input name="numbervalue" size="60" maxlength="255">
</td></tr>
<tr><td>
<input type="submit" name="submit" value="submit">
</form>
</td></tr></table>
<?php
}
?>

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