ldc-jeusselin/app/Http/Controllers/Pro/DashboardController.php

<?php

namespace App\Http\Controllers\Pro;

use App\Http\Controllers\Controller;
use App\Models\CotationsData;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class DashboardController extends Controller
{
    public function index(Request $request)
    {
        //$cotations = CotationsData::whereNotNull('prix')->orderBy('produit')->orderBy('qualite')->orderBy('recolte')
        $cotations = CotationsData::select('produit','qualite','recolte', DB::raw("GROUP_CONCAT(echeance,'::',prix SEPARATOR '|@|') AS prices"))
                                    ->groupBy('produit')
                                    ->groupBy('qualite')
                                    ->groupBy('recolte')
                                    ->get();

        return view('pro.dashboard.index',compact('cotations'));
    }
}