$data = DB::table("productTesting")
            ->select("productTesting.*","categories.*")
            ->join(DB::raw("(SELECT 
            categories.id,
            GROUP_CONCAT(categories.name) as categoriesName
            FROM categories
            GROUP BY categories.id
            ) as categories"),function($join){
            $join->on("categories.id","=","productTesting.categoryId");
            })
            ->groupBy("productTesting.id")
            ->get();
            dd($data);
        

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