PHP something wrong with while loop - php

Question

Okay so now its display results like 3 times in a row
$user_apps = mysql_query("SELECT a.name,a.download_url FROM user_apps as ua LEFT JOIN
apps as a ON (ua.app_id=a.app_id)
WHERE ua.user_id='$user_id'") or die(mysql_error());
while($raw = mysql_fetch_array($user_apps)){
$name = $raw['name'];
$url = $raw['download_url'];
echo $name;
echo "<br />";
echo $url;
}
Database Table Structure(since I am new to the site and did not know how to display the table structure I just exported the sql)
CREATE TABLE IF NOT EXISTS `users` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(255) NOT NULL,
`password` varchar(255) NOT NULL,
PRIMARY KEY (`id`),
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=9 ;
CREATE TABLE IF NOT EXISTS `user_apps` (
`user_id` int(11) NOT NULL,
`app_id` int(11) NOT NULL,
KEY `user_id` (`user_id`,`app_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE IF NOT EXISTS `apps` (
`app_id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
`description` text NOT NULL,
`icon` varchar(255) NOT NULL,
`download_url` varchar(255) NOT NULL,
`default` int(20) NOT NULL DEFAULT '0',
PRIMARY KEY (`app_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=10 ;
I'v tried different Join types but that does not seem to work.

Answer 1

Used the join query for get the result check bellow example query
$user_apps = mysql_query("SELECT DISTINCT a.name,a.download_url FROM user_apps as ua LEFT JOIN apps as a ON (ua.app_id=a.app_id) WHERE ua.user_id='$user_id'") or die(mysql_error());
while($raw = mysql_fetch_array($user_apps)){
$name = $raw['name'];
$url = $raw['download_url'];
echo $name;
echo $url;
}
change the join type as per your requirement. the above query for only example
INNER JOIN: Returns all rows when there is at least one match in BOTH
tables
LEFT JOIN: Return all rows from the left table, and the matched rows
from the right table
RIGHT JOIN: Return all rows from the right table, and the matched
rows from the left table
FULL JOIN: Return all rows when there is a match in ONE of the tables
more about join click here
AND also check this http://blog.codinghorror.com/a-visual-explanation-of-sql-joins/

Answer 2

You have used single quotes in query at user_id='$user_id' .
Are you sure your user_id is char, varchar or text? Just print_r($user_apps) and check it has any records or not? If user_id is int,tinyin than remove single quote.