MarkLogic node.js api - group by and sort by count

问题

In a relational db you'd have something like "select name, count(1) as c from mytable group by name order by c desc". Basically I want to count how many records contain each name value and get the ones with highest counts first.

Is there a way to do a similar thing in Marklogic using the Node.js API?

回答1:

Something like this should work:

var marklogic = require('marklogic');
var my = require('./my-connection.js');

var db = marklogic.createDatabaseClient(my.connInfo);
var vb = marklogic.valuesBuilder;

db.values.read(
  vb.fromIndexes('name')
    .withOptions({values: ['descending', 'frequency-order']});

The Querying Lexicons and Range Indexes section of the Node.js Application Developer's Guide will provide more detail.

来源：https://stackoverflow.com/questions/40715822/marklogic-node-js-api-group-by-and-sort-by-count