XQuery syntax


  Translation results:

The best way to explain XQuery is this: XQuery is to XML what SQL is to database tables.

XQuery is designed to query XML data - not just XML files, but any data that can be represented in XML form, including databases.

XQuery syntaxsyntax

XQuery is case-sensitive, and XQuery elements, attributes, and variables must be legal XML names.

XQuery syntaxexample

for $x in doc("books.xml")/bookstore/book
returnif ($x/@category="CHILDREN")
then <child>{data($x/title)}</child>
else <adult>{data($x/title)}</adult>

Please note the syntax of "If-Then-Else": the parentheses after the if expression are required. else is also required, but just "else ()" will work.

The result of the above example:

<adult>Everyday Italian</adult>
<child>Harry Potter</child>
<adult>Learning XML</adult>
<adult>XQuery Kick Start</adult>

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