MySQL语法问题-ORDER BY-Joomla PHP

Question

I have a syntax issue that I can't seem to figure out. I'm following the Joomla docs found here:

https://docs.joomla.org/Selecting_data_using_JDatabase#Selecting_Records_from_a_Single_Table

And I'm getting this error:

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order DESC' at line 3 SQL=SELECT `id`,`image`,`order`,`status` FROM `vsem6_session_1` ORDER BY order DESC 

My Query is:

$db = JFactory::getDbo();
$query = $db->getQuery(true);

$query->select($db->quoteName(array('id', 'image', 'order', 'status')));
$query->from($db->quoteName('#__session_' . $id));
$query->order('order DESC');

$db->setQuery($query);
$results = $db->loadObjectList();   

return $results;

It works great if I take out the order clause, but of course the results aren't ordered. I've search high and low and can't figure it out. Anyone notice anything? I am 100% certain there is an "order" column in the table.

I tried this, which shows no error, but it still doesn't order properly.

$query->orderby('order DESC');

Answer 1

order is a reserved word as its used in order by . So to solve mysql's confusion you need to mark your use of order as a field name with back ticks

Answer 2

$query->order('order DESC');

The problem with this is that that you have not used quoteName().

$query->order($db->quoteName('order') . 'DESC');

Even though you said you would change the field name, I'm adding this for the situation in which someone could not change the name.