XQuery? ???? ?? ?? ??? ??? ????. XQuery? XML ?? ??? SQL? ?????? ??? ?? ??? ?????.

XQuery? XML ???? ??? ??????? ???? XML ???? ??? ? ?? ?? ???? ????? ???????.

XQuery ?? ???

XQuery?? ??, ??, ???, ??????, ?? ??, ??, ?? ??(?? ?? ??) ? 7?? ??? ??? ????.

XQuery ?? ?

<?xml version="1.0" encoding="ISO-8859-1"?>
<bookstore>
<book>
  <title>Harry Potter</title>
  <author>J K. Rowling</author>
  <year>2005</year>
  <price>29.99</price>
</book>
</bookstore>

? XML ??? ?? ?:

<bookstore> (文檔節(jié)點(diǎn))
<author>J K. Rowling</author> (元素節(jié)點(diǎn))
lang="en" (屬性節(jié)點(diǎn))