XQuery Sequences Functions

Explore essential XQuery sequence functions like count(), sum(), avg(), min(), max(), and more for processing and manipulating item sequences in XQuery 1.0.

The following table lists the commonly used sequence functions provided by XQuery.

Name	Description
`count($seq as item()*)`	It is used to count the items in a sequence.
`sum($seq as item()*)`	It is used to return the sum of the items in a sequence.
`avg($seq as item()*)`	It is used to return the average of the items in a sequence.
`min($seq as item()*)`	It is used to return the minimum valued item in a sequence.
`max($seq as item()*)`	It is used to return the maximum valued item in a sequence.
`distinct-values($seq as item()*)`	It returns select distinct items from a sequence.
`subsequence($seq as item()*, $startingloc as xs:double, $length as xs:double)`	It is used to return a subset of provided sequence.
`insert-before($seq as item(), $position as xs:integer, $inserts as item())`	It is used to insert an item in a sequence.
`remove($seq as item()*, $position as xs:integer)`	It is used to remove an item from a sequence.
`reverse($seq as item()*)`	It is used to return the reversed sequence.
`index-of($seq as anyatomictype()*, $target as anyatomictype())`	It returns indexes as integers to indicate availability of an item within a sequence.
`last()`	It returns the last element of a sequence when used in predicate expression.
`position()`	It is used in FLOWR expressions to get the position of an item in a sequence.