# DISTINCTCOUNTHLLMV

Returns an approximate distinct count using HyperLogLog in a group

## Signature

> DISTINCTCOUNTHLLMV(colName)

## Usage Examples

These examples are based on the [Hybrid Quick Start](https://docs.pinot.apache.org/release-0.12.1/basics/getting-started/quick-start#hybrid).

```sql
select DISTINCTCOUNTHLLMV(DivLongestGTimes) AS value
from airlineStats 
where arraylength(DivLongestGTimes) > 1
```

| value |
| ----- |
| 34    |