# TOPK.QUERY












Checks whether one or more items are one of the Top-K items.

## Parameters

* **key**: the name of the sketch.
* **item**: the items to be queried.

## Example

```
redis> TOPK.QUERY topk 42 nonexist
1) (integer) 1
2) (integer) 0
```

## Return information

{{< multitabs id=“topk-query-return-info" 
    tab1="RESP2" 
    tab2="RESP3" >}}

One of the following:

* [Array](https://redis.io/docs/latest/develop/reference/protocol-spec#arrays) of [integer replies](https://redis.io/docs/latest/develop/reference/protocol-spec#integers): `1` if an item is in the Top-K or `0` otherwise.
* [Simple error reply](https://redis.io/docs/latest/develop/reference/protocol-spec#simple-errors) in these cases: non-existant key or key of the incorrect type.

-tab-sep-

* [Array](https://redis.io/docs/latest/develop/reference/protocol-spec#arrays) of [boolean replies](https://redis.io/docs/latest/develop/reference/protocol-spec#booleans): `true` if an item is in the Top-K or `false` otherwise.
* [Simple error reply](https://redis.io/docs/latest/develop/reference/protocol-spec#simple-errors) in these cases: non-existant key or key of the incorrect type.