The MySQL SUM function takes the fields or rows you input and adds their values together, then returns the total. Save your query in a PHP variable. You can use the function as many times as you ...

You might then generate links to the full post by passing the ID result on to the URL using the $_POST function in PHP. For more information, consult your PHP and mySQL manuals.

Might want to check your /etc/php.ini and make sure you have the "extension=mysql.so" uncommented (restart Apache if you make a change). Also might want to check over the [MySQL] section.