Column in aggregation constraint for which there must be a minimum number of distinct values in an output row for it to be in the query output.
The minimum number of distinct values that an output row must be an aggregation of. Minimum threshold of distinct values for a specified column that must exist in an output row for it to be in the query output.
The type of aggregation the constraint allows. The only valid value is currently COUNT_DISTINCT.
COUNT_DISTINCT