How to find max value in db column?

[smtu...@gmail.com]

I want to search a db column for the highest value and return it.

I tried:

$sql = R::exec('SELECT MAX(featured_order_id) FROM ads');

But no luck.

There is another (working) piece of code in the same function that looks like:

$count = R::count('ads', " featured_order_id=$order_id ", array('featured_order_id'=>$order_id));

Do I need to follow this pattern?

[Anak1]

Look R::getCell