thinkphp 子查询

$subQuery = M("zstar_apply_goods")
    ->join("LEFT JOIN shop_products ON zstar_apply_goods.ShopToken = shop_products.ShopToken")
    ->where($where)
    ->field("zstar_apply_goods.ShopToken")
    ->group("zstar_apply_goods.ShopToken")
    ->buildSql();
$result = M("zstar_apply_goods")->table($subQuery . ' a')->count();