Introduction to XQuery

Wannan ya yiwa koyar da XQuery kuma ya yiwa girmama ga XML, kuma yana ƙarfi ga SQL kuma yana ƙarfi ga dukiyar duniya.

XQuery ya yiwa girmama da koyar da dukiyar XML - kuma yana ƙarfi ga dukiyar XML, kuma yana ƙarfi ga dukiyar da za a iya ƙirƙira a matsayin XML, kuma yana ƙarfi ga dukiyar duniya.

Ka ƙarfi ga kowacce koyarwa a cikin ƙarshe:

Idan ka shaɗi da koyar da dukiyar, ka ba da ƙarfi ga kowacce koyarwa a cikin ƙarshe:

  • HTML / XHTML
  • XML / XML na magani
  • XPath

Idan ka shaɗi da koyar da dukiyar da ka ƙaɗa a hanyar, ka ƙo ɗaya daga suwa: Babban ƙasa Yiwar da suwa dukiyar yadda ka ƙaɗa.

Kuma na XQuery?

  • XQuery ne yanci ɗin yin ɗan ɗaya daga dukiyar XML.
  • XQuery ya yiwa girmama ga XML dake ɗaya daga SQL girmama ga dukiyar duniya.
  • XQuery ya yiwa ɗaya daga XPath ɗan ɗaya.
  • XQuery ya yiwa girmama daga dukiyar da ke kai da dukiyar duniya (IBM, Oracle, Microsoft da sauransu).
  • XQuery naɗi ne ɗan ɗaya na ɗan ɗaya na W3C.

XQuery and XML queries are related

XQuery is a language used to search and extract elements and attributes from XML documents.

This is an example of an XQuery solving practical problems：

“Select all CD records with prices below $10 from the CD collection stored in the XML document named cd_catalog.xml.”

XQuery and XPath

XQuery 1.0 and XPath 2.0 share the same data model and support the same functions and operators. If you have already learned XPath, then learning XQuery will not be a problem.

You can read more about XPath in our《XPath Tutorial》to read more about XPath knowledge.

XQuery - Application Examples

XQuery can be used for：

  • Extract information for use in network services
  • Generate summary reports
  • Convert XML data to XHTML
  • Search network documents to obtain relevant information

XQuery is a W3C recommended standard

XQuery is compatible with various W3C standards such as XML, Namespaces, XSLT, XPath, and XML Schema.

XQuery 1.0 was established as a W3C recommended standard on January 23, 2007.

For more information about the W3C's XQuery events, please read our《W3C Tutorial》。