Hi, everyone: Here is my query that finds the distinct value and counts them, you can see that I used the same sub query twice, first for finding the distinct values, second for count the distinct values, is there a way that I can cache the sub query result and reuse it somewhere else? I think it will run faster in that way.
import module namespace fx = "http://www.functx.com" at "functx-1.0-doc-2007-01.xq"; declare namespace business="http://www.sipo.gov.cn/XMLSchema/business"; declare namespace base="http://www.sipo.gov.cn/XMLSchema/base";
(:Iterate through the distributed values:) for $dis_val in ( ( (:open multi database, then query the doc status field:) for $result in doc("50PatentDividedCreatingClause.xml")/results/result return db:open($result/dbName)/business:PatentDocumentAndRelated/@status ) =>distinct-values() ) return "value : " || $dis_val || ", count: "|| count( for $status in ( for $result in doc("50PatentDividedCreatingClause.xml")/results/result return db:open($result/dbName)/business:PatentDocumentAndRelated/@status ) where $status = $dis_val return $status||"")
