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XQuery Sequence Functions

Let's check XQuery 's list of widely used sequence functions:

Sr No	Name	Description
1.	count($seq as item()*)	It is used for sequence counting of items.
2.	sum($seq as item()*)	The sum of the items in a list is returned using it.
3.	avg($seq as item()*)	It is used to return the items average in a sequence.
4.	min($seq as item()*)	It is used in a sequence to return the minimally valued item.
5.	max($seq as item()*)	It is used to return a sequence of the highest valued item.
6.	distinct-values($seq as item()*)	It returns separate items selected from a sequence.
7.	subsequence($seq as item()*, $startingloc as xs:double, $length as xs:double)	It is used for returning a subset of the sequence given.
8.	insert-before($seq as item(), $position as xs:integer, $inserts as item())	Used for inserting an item into a sequence.
9.	remove($seq as item()*, $position as xs:integer)	Deleting an item from a sequence is allowed.
10.	reverse($seq as item()*)	It is used to return the reversed sequence.
11.	index-of($seq as anyatomictype()*, $target as anyatomictype())	It returns indexes as integer showing an item 's availability within a sequence.

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