By Priscilla Walmsley
With the XQuery 1.0 ordinary, you ultimately have a device that may make it a lot more straightforward to go looking, extract and control info from XML content material kept in databases. This in-depth educational not just walks you thru the XQuery specification, but additionally teaches you ways to application with this commonly expected question language.
XQuery is for question writers who've a few wisdom of XML fundamentals, yet now not inevitably complex wisdom of XML-related applied sciences. it may be used either as an instructional, via interpreting conceal to hide, and as a reference, by utilizing the great index and appendixes. both manner, you will discover the historical past wisdom in namespaces, schemas, integrated forms and ordinary expressions that's correct to writing XML queries. This e-book provides:
- A high-level review and quickly journey of XQuery
- Information to write down subtle queries, with no being slowed down by way of the main points of varieties, namespaces, and schemas
- Advanced techniques for clients who are looking to reap the benefits of modularity, namespaces, typing and schemas
- Guidelines for operating with particular kinds of info, akin to numbers, strings, dates, URIs and processing instructions
- A entire alphabetical connection with the integrated services and types
You also will know about XQuery's aid for filtering, sorting, and grouping info, in addition to the best way to use FLWOR expressions, XPath, and XQuery instruments for extracting and mixing info. With this booklet, you will find find out how to follow all of those instruments to a wide selection of information resources, and the way to recombine info from a number of resources right into a unmarried ultimate output result.
Whether you are coming from SQL, XSLT, or ranging from scratch, this conscientiously paced educational takes you thru the ultimate 1.0 commonplace in detail.
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Extra resources for XQuery
The catalog. xml rfile is a product catalog containing normal information regarding items (Example 1-1). instance 1-1. Product catalog enter record (catalog. xml)