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The XQuery current-date TIME() FUNCTION is used to RETURN the current date and time.

The XQuery current-date time() function is used to return the current date and time.

The XQUERY current-TIME function is USED to RETRIEVE the current time.

The XQuery current-time function is used to retrieve the current time.

The XQUERY CURRENT date function is USED to RETRIEVE the current date.

The XQuery current date function is used to retrieve the current date.

In XQUERY, TIME and date FUNCTION is USED to get time and date.

There are three types of time and date functions in XQuery:

1. current-date()
2. current-time()
3. current-datetime()

In XQuery, time and date function is used to get time and date.

There are three types of time and date functions in XQuery:

A list of different types of XQuery functions:

• ACCESSOR Functions
• ERROR and Trace Functions
• Numeric Functions
• String Functions
• AnyURI Functions
• Boolean Functions
• Duration/Date/Time Functions
• QNAME Functions
• Node Functions
• SEQUENCE Functions
• Context Functions

A list of different types of XQuery functions:

If you want to put HTML element with XQuery FLWOR, you should have to add and tags into the FLWOR expression.

For EXAMPLE:

<ul>
{
for $x in doc("books.xml")/bookstore/book/title
order by $x
RETURN <li>{$x}</li>
}
</ul> 

If you want to put HTML element with XQuery FLWOR, you should have to add and tags into the FLWOR expression.

For example:

<ul>
{
for $x in doc("books.xml")/bookstore/book/title
order by $x
return <li>{$x}</li>
}
</ul> 

XQuery ADD is USED for ADDING ELEMENTS, attributes, HTML elements and text in the results from the input documents.

XQuery Add is used for adding elements, attributes, HTML elements and text in the results from the input documents.

The ELEMENTS, attributes and VARIABLES in XQuery LANGUAGE must be valid XML names and follow CASE sensitivity.

The elements, attributes and variables in XQuery language must be valid XML names and follow case sensitivity.

Conditional operation in XQuery is If-Then-Else operation. Let?s take an EXAMPLE to see how to use it:

Example:

for $a in doc("bookmart.xml")/bookstore/book
RETURN if ($a/@category="ADVENTURE")
then &LT;child>{DATA($a/title)}</child>
else <ADULT>{data($a/title)}</adult> 

Conditional operation in XQuery is If-Then-Else operation. Let?s take an example to see how to use it:

Example:

for $a in doc("bookmart.xml")/bookstore/book
return if ($a/@category="ADVENTURE")
then <child>{data($a/title)}</child>
else <adult>{data($a/title)}</adult> 

XQUERY FLWOR and Path expression are used for selecting and FILTERING the XML elements. Both are used to select and filter the DESIRED elements.

For example:

for $a in doc("bookmart.xml")/bookstore/book
where $a/price&LT;150
ORDER by $a/title
return $a/title

XQuery FLWOR and Path expression are used for selecting and filtering the XML elements. Both are used to select and filter the desired elements.

For example:

for $a in doc("bookmart.xml")/bookstore/book
where $a/price<150
order by $a/title
return $a/title

XQuery HTML format is a way to TRANSFORM an XML document into an HTML PAGE.

XQuery HTML format is a way to transform an XML document into an HTML page.

FLWOR is an acronym which STANDS for "For, LET, Where, Order by, Return".

For - It is used to select a sequence of NODES.

Let - It is used to bind a sequence to a variable.

Where - It is used to filter the nodes.

Order by - It is used to sort the nodes.

Return - It is used to specify what to return (gets EVALUATED once for every node).

FLWOR is an acronym which stands for "For, Let, Where, Order by, Return".

For - It is used to select a sequence of nodes.

Let - It is used to bind a sequence to a variable.

Where - It is used to filter the nodes.

Order by - It is used to sort the nodes.

Return - It is used to specify what to return (gets evaluated once for every node).

• XQuery can be used to solve the FOLLOWING QUERIES in XML data:
• XQuery is used to retrieve INFORMATION in a web SERVICE.
• It is used to generate summary report.
• It is used to transform data from XML to XHTML.

In XQuery, comparison is performed with GENERAL comparison or value comparison.

1. General Comparison: It is performed by using the following symbols.

EX: =, !=, <, <=, >, >=

2. Value Comparison: The value comparison is performed by using the following symbols.

Ex: ne, lt, le, eq, ge, gt.

See this example:

$bookstore//book/@q > 100

If any q attributes have VALUES greater than 100, the EXPRESSION will return true OTHERWISE false.

In XQuery, comparison is performed with general comparison or value comparison.

1. General Comparison: It is performed by using the following symbols.

Ex: =, !=, <, <=, >, >=

2. Value Comparison: The value comparison is performed by using the following symbols.

Ex: ne, lt, le, eq, ge, gt.

See this example:

$bookstore//book/@q > 100

If any q attributes have values greater than 100, the expression will return true otherwise false.

Example 1: When you use function in an element.

<NAME>{uppercase($booktitle)}</name>

Example 2: When you use function in the PREDICATE of a path expression.

doc("bookmart.xml")/bookstore/book[substring(title,1,5)='JUNGLE']

Example 3: When you use function in a let clause

let $name := (substring($booktitle,1,4))

Example 1: When you use function in an element.

<name>{uppercase($booktitle)}</name>

Example 2: When you use function in the predicate of a path expression.

doc("bookmart.xml")/bookstore/book[substring(title,1,5)='Jungle']

Example 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 also facilitates you to MAKE your own functions.

XML has many build-in functions. XQuery functions generally made perform with string values, numeric values, date and time comparisons, Boolean values etc.

XQuery also facilitates you to make your own functions.

• XQuery is program driven while XSLT is document-driven.
• XQuery is DECLARATIVE while XSLT is functional.
• XSLT is WRITTEN in XML while XQuery is not written in XML.

DIFFERENCE between XQuery and Xpath:

XQuery is a functional programming and query language while XPath is XML path language.

XQuery is used to EXTRACT and manipulate data from either XML documents or RELATIONAL DATABASES while XPath is used to compute values like STRINGS, numbers and Boolean types from another xml documents.

Difference between XQuery and Xpath:

XQuery is a functional programming and query language while XPath is XML path language.

XQuery is used to extract and manipulate data from either XML documents or relational databases while XPath is used to compute values like strings, numbers and Boolean types from another xml documents.

A list of basic syntax rules for XQuery:

• XQuery is case SENSITIVE.
• Attributes and variables that we used should have valid XML names in XQuery elements.
• XQuery should be written within SINGLE and double QUOTES.
• XQuery variables should be defined as: $(variable name). For EXAMPLE: $book.
• XQuery comment can be written between colon (:). like :(: Comment in XQuery:)

A list of basic syntax rules for XQuery:

XQuery was FIRST APPEARED in 2007. It was designed by W3C and BECAME the W3C recommendation on JANUARY 23, 2007. XQuery 3.0 is a W3C recommendation from April 8, 2014.

XQuery was first appeared in 2007. It was designed by W3C and became the W3C recommendation on January 23, 2007. XQuery 3.0 is a W3C recommendation from April 8, 2014.

XQuery is a functional LANGUAGE for finding and extracting elements and attributes from XML documents. Its main usages are:

• To retrieve both hierarchal and tabular DATA.
• To query tree and graphical structures.
• To BUILD web pages.
• To query web pages.
• To transform XML documents into XHTML documents.
• Best for XML-based databases and object-based databases. Object databases are much more flexible and powerful than PURELY tabular databases.

XQuery is a functional language for finding and extracting elements and attributes from XML documents. Its main usages are:

XQUERY is a XML query LANGUAGE which was designed to query XML DATA. It is same LIKE SQL for database tables. XQuery is used to retrieve data from the XML file.

XQuery is a XML query language which was designed to query XML data. It is same like SQL for database tables. XQuery is used to retrieve data from the XML file.