incremento de una sola columna de laravel
Product::increment('count' , 5); // count + 5
Product::decrement('count', 5); // count - 5
---------------Or-----------------------
Product::where('product_id', $product->id)
->update([
'count'=> DB::raw('count+1'),
'last_count_increased_at' => Carbon::now()
]);
incremento de laravel
$customer = Customer::find($customer_id);
$loyalty_points = $customer->loyalty_points + 1;
$customer->update(['loyalty_points' => $loyalty_points]);
or
Customer::find($customer_id)->increment('loyalty_points');