Question

我已经在数据库中联接了三个表，现在我想在区域表中独特地选择列区域中的值，并计算在联接表中重复的每个区域的计数。以下代码是我如何加入城市，商店和区域表

$product = Producttext::where('id',$id)->first();


//test and check that you have it $product->SupplierID

$suplierproduct = Company::select('id', 'CompanyName')->where('id',$product->SupplierID)
->first();

Answer 1

尝试一下：

$zones= Store::join('cities as c','store.city_id','=','c.id')
        ->join('zones as z','c.zone_id','=','z.id')
        ->select(DB::raw('count(z.id) as z_count, z.*'))
        ->groupBy('z.id')
        ->get();

从laravel中的数据库中独特地选择一列

1 个答案: