An XQuery FLWOR expression

FLWOR is a "for, let, Where, Order by, Return" acronym.
The For statement extracts all the book elements under the bookstore element into a variable named $x.
The WHERE statement selects the book element with the price element value greater than 30.
The order BY statement defines the sort order. will be sorted according to the title element.
The return statement specifies what content is returned. The title element is returned here.

forinDoc ("books.xml")/bookstore/book where $x/price>30 by order $x/title return $x/title

An XQuery FLWOR expression