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MarkLogic 9 Product Documentation
op.sample

op.sample(
   aggColName as String,
   columndef as String,
   [options as String]
) as aggregatedef

Summary

This function randomly selects one non-null value of the column from the rows in the group or row set. The result is used for building the parameters used by the prototype.groupBy function.

Parameters
aggColName The name to be used for the value.
columndef The group or row set.
options The options can take a values key with a distinct value to average the distinct values of the column.

Example


const op = require('/MarkLogic/optic');

op.fromView('main', 'expenses')
   .groupBy('Category', op.sample("Sample Spent", "Amount"))
   .orderBy('Category')
   .result();

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