ApproxCardinalityReduce Output Table Schema
Column | Data Type | Description |
---|---|---|
target_column | Same as in input table | [Column appears once for each specified target_column.] Column for which number of distinct values was estimated. |
cnt | INTEGER | Approximate cardinality. |
method | VARCHAR | Method used to calculate approximate cardinality—'approx' (Flajolet-Martin algorithm) or 'nearExact' (counting). |