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


This function counts the rows where the specified input column has a value. If the input column is omitted, all rows in the group or row set are counted. The result is used for building the parameters used by the prototype.groupBy function.

aggColName The name to be used for the column values.
columndef The columns to be counted.
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.count("Number of Expenses", "Amount"))

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