SQLServer2005 怎样查询带有命名空间的XML节点,
 <bk:book genre="novel" bk:genre="fiction" 
xmlns:bk="urn:xmlns:25hoursaday-com:bookstore">
    <bk:title>The Confidence Man</bk:title>
    <bk:author>
      <bk:first-name>Herman</bk:first-name>
      <bk:last-name>Melville</bk:last-name>
    </bk:author>
    <bk:price>15.0</bk:price>
  </bk:book>
在上面的XML里面,我想查询book下面的price节点,应该怎么用Xpath定位到它
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