INTERVIEW QUESTIONS XML XQUERY DETAILS

Question: How to define functions in XQuery?

Answer: XML has many build-in functions. XQuery functions generally made perform with string values, numeric values, date and time comparisons, boolean values etc.
XQuery has also give us facility to made our own functions.
Now, I told you how to call XQuery functions.
Ex 1: When you use function in an element.
<name>{uppercase($booktitle)}</name>

Ex 2: When you use function in the predicate of a path expression.
doc("bookmart.xml")/bookstore/book[substring(title,1,5)='Jungle']

Ex 3: When you use function in a let clause
let $name := (substring($booktitle,1,4))

XML has many build-in functions. XQuery functions generally made perform with string values, numeric values, date and time comparisons, boolean values etc.
XQuery has also give us facility to made our own functions.
Now, I told you how to call XQuery functions.
Ex 1: When you use function in an element.
<name>{uppercase($booktitle)}</name>

Ex 2: When you use function in the predicate of a path expression.
doc("bookmart.xml")/bookstore/book[substring(title,1,5)='Jungle']

Ex 3: When you use function in a let clause
let $name := (substring($booktitle,1,4))
Source: CoolInterview.com

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