Pass a raw query to order your results

You can pass a raw query to order your results.

For example, sorting tasks by how long before the due date they were completed.

// Sort tasks by the task was completed before the due date
$tasks = Task::query()
    ->whereNotNull('completed_at')
    ->orderByRaw('due_at - completed_at DESC')
    ->get();

Tip given by @cosmeescobedo