Querying info from one table based on info in another

Posted on 16th Feb 2014 07:03 pm by admin

Hi, I am currently trying to make a part for my user driven website where one user can subscribe to another and whoever they have subscribed to is echoed back on there profile page.

my users table structure is: id username password and my subscription table is: id user_id follow_id

i am currently trying to query the logged in users subscriptions with this sql_query

$subsQuery = mysql_query("SELECT U.username FROM users AS U INNER JOIN subscription AS Sub.follow_id=U.id WHERE Sub.user_id=".$ID); $ID being the logged in users id.

However when trying to echo this on the page using this bit of php:

<? while ($subs = mysql_fetch_assoc($subsQuery)) { ?><br /><br />
<? echo $subs['username'] ?>

<? } ?>

it throws back this error:

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /home/avince/public_html/users/user.php on line 53

Any help would be much appreciated!

Your Answer:

Login to answer

Other forums

Warehouse Management
Hi,

On our system, we have two storage locations ( A and B ) where A is the main factory

Prevention Help
How can I use PHP or any other language (feel free to move this thread) to prevent users doing scree

PHP - MySQL Fail
My PHP code will only execute the first part of my code...

Code: <?php

sessio

Re-Order by ID Number
I have a cms set up for inputting an image, thumb, title, pdf, and eps. When input the database ass

apart from cron
I need to run a php file every one hour. Is there any other solution apart from cron job?

How to copy a part of a vector in a raw memory
Hi,

How can I copy a part of a vector into a memory:

1
2
3
4
5

Sessions Value Not Saved
Hi,

Im making a login form and im using this code:
Code: if($login=="true"){

import table with dependency
Hi

What is the best way to import table back which has dependency?

SQL> cre

Match stored value with the current value in a loop
Hello,

I have a MySQL db were I store articles in.

I have a form to fill these article

Need help with a mail notify function
I was tasked with setting up a site that's been prewritten. The site is basically a form that captur