AggVariant returns a variant value when given a warehouse aggregate function and acceptable argument(s).
This function is the aggregation version of CallVariant.
Usage
AggVariant(function name, arguments...)
function name (required): The name of an aggregate function supported by your data warehouse. The function must return a variant value.
arguments (required): One or more arguments to be passed to the warehouse function. All arguments must meet the warehouse function’s input requirements.