我在sql server数据库中的xml输出有问题。我的桌子：

CREATE TABLE [dbo].[test_table](
    [id] [int] IDENTITY(1,1) NOT NULL,
    [firstname] [nvarchar](255) NULL,
    [lastname] [nvarchar](255) NULL,
    [city] [nvarchar](255) NULL,
    [street] [nvarchar](255) NULL,
    [streetno] [int] NULL
)

我想要输出，其中Address嵌套在每个Person内，如下所示：

<Root>
  <Person id="1">
    <firstname>Stefanie</firstname>
    <lastname>Buckley</lastname>
    <Address>
      <city>Oklahoma</city>
      <street> Cowley Road</street>
      <streetno>34</streetno>
    </Address>
  </Person>
  <Person id="2">
    <firstname>Sandy</firstname>
    <lastname>Mc Gee</lastname>
    <Address>
      <city>Montgomery</city>
      <street> Hague Parkway</street>
      <streetno>27</streetno>
    </Address>
  </Person>
</Root>

我已经尝试过嵌套选择：

 select tbl1.id '@id', tbl1.firstname, tbl1.lastname,
 (
 select city,street,streetno from test_table as tbl2
 where tbl2.id = tbl1.id
 for xml path('Address')
 ) 
 from test_table as tbl1
 for xml path('Person'), Root('Root')

但是输出是这样的：

<Root>
  <Person id="1">
    <firstname>Stefanie</firstname>
    <lastname>Buckley</lastname>&lt;Address&gt;&lt;city&gt;Oklahoma&lt;/city&gt;&lt;street&gt; Cowley Road&lt;/street&gt;&lt;streetno&gt;34&lt;/streetno&gt;&lt;/Address&gt;</Person>
  <Person id="2">
    <firstname>Sandy</firstname>
    <lastname>Mc Gee</lastname>&lt;Address&gt;&lt;city&gt;Anchorage&lt;/city&gt;&lt;street&gt; North Green Clarendon Road&lt;/street&gt;&lt;streetno&gt;29&lt;/streetno&gt;&lt;/Address&gt;</Person>
  <Person id="3">

我做错了什么？