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   $aggColName as String,
   $columndef as String,
   [$options as String]
) as aggregatedef


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

$aggColName The name to be used for the largest 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.


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

op.fromView('main', 'expenses')
   .groupBy('Category', op.max("Maximum Spent", "Amount"))

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