How to set mysql update query in php laravel?

Question

Laravel

Need instead? write a query to subtract 1 from the count field

DB::table('table')
   ->where('id', $id)
   ->update(
        [
          'count' =>?,
          'updated_at' => now()
         ]
        );
   }

Answer 1

// ...
'count' => \DB::raw('count - 1'),
// ...

Answer 2

With Decrement or in your example

DB::table('table')
   ->where('id', $id)
  ->decrement('count');

updated_at is updated automatically