p = "for $floor in Building/Floors/Floor "

         "let $Name := $floor/Name"

         "where $floor/@GUID !=\"6A26A83F0EDA42F88088BDD4CF06A077\" "

     "order by $Name "
    "return $Name ";

没行后面要有空库，否则$floor/Name where会解析成$floor/Namewhere