# MAXK\_UNIQUE

```
MAXK_UNIQUE(numExpr, N)
```

Returns the N smallest unique values of a numExpr.

Available in:

| Processor (stateless) | Processors (stateful) | SQL Studio |
| --------------------- | --------------------- | ---------- |
| ✓                     |                       |            |

*Sample code:*

```sql
USE `kafka`;
SELECT MAXK_UNIQUE(total) 
FROM orders-events
```

*Output:*

```json
{
  "value": {
    "MAXK_UNIQUE": [
      99.97
    ]
  }
}
```