Expand description
CountHash / count_hash is a hash-based approximate distinct count function.
It is a variant of CountDistinct that uses a hash function to approximate the
distinct count.
It is designed to be more efficient than CountDistinct for large datasets,
but it is not as accurate, as the hash value may be collision.
Structs§
- Count
Hash - Count
Hash 🔒Accumulator - Count
Hash Group Accumulator - GroupsAccumulator for
count_hashaggregate function