在Laravel中获取MySQL中的最大值

Question

Here is my Query in Laravel

$salename = DB::table('home_sc')->where('OrderNo', $orderno)->pluck('salesconfirmation');

Here i am using pluck, where it will get the salesconfirmation with the $orderno.

But how can i get the salesconfirmation for the max $orderno

Update: OrderNo is not Unique or an Auto Increment, the table however, has another field named ID, this is the field for which I need to retrieve to max value of.

Answer 1

Assuming that OrderNo is an incremental value, you could do this:

DB::table('home_sc')->orderBy('ID', 'DESC')->where('OrderNo', $orderno)
    ->take(1)->pluck('salesconfirmation');

Also, just a sidenote, but it may be worth considering a change to the database structure, as you've got three naming conventions in this query alone.