# ZINTERSTORE

> Store sorted set intersection.

Use `ZINTERSTORE` to compute the intersection of sorted sets and store it in another key.

The destination gets the members present in every input, scored by the sum of their scores by default, or by `MIN` or `MAX` when `AGGREGATE` is given, with `WEIGHTS` scaling each input beforehand. The destination is overwritten if it exists and deleted when the intersection is empty, and the reply is the number of members stored.

This is how a combined ranking is built once, for instance blending a relevance score with a popularity score, and then paged through with [`ZRANGE`](/redis/commands/sorted-set/zrange).

## Syntax

```redis
ZINTERSTORE <destination> <numkeys> <key> [<key> ...]
  [WEIGHTS <weight> [<weight> ...]]
  [AGGREGATE SUM | MIN | MAX]
```

## Arguments

| Argument | Required | Repeatable | Description |
| --- | --- | --- | --- |
| `<destination>` | Yes | No | Redis key used as destination. |
| `<numkeys>` | Yes | No | Number of key arguments that follow. |
| `<key>` | Yes | Yes | Redis key targeted by the command. |
| `WEIGHTS <weight>` | No | Yes | Multiplier applied to each input key's scores, in the order the keys were given. |
| `(AGGREGATE SUM \| MIN \| MAX)` | No | No | Under `AGGREGATE`, choose one form: `SUM`; `MIN`; `MAX`. |

## Important points

- `numkeys` must equal the number of key arguments that immediately follow it.

## Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

| Protocol | Reply |
| --- | --- |
| RESP2 | Integer |
| RESP3 | Integer |

<Note>
  Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.
</Note>

## Examples

TCP examples use the TLS `REDIS_URL` from the Upstash console. REST examples use `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN`.

<AccordionGroup>

<Accordion title="Redis CLI" icon="terminal">

```bash
ZINTERSTORE destination-key 1 my-key
```

</Accordion>

<Accordion title="@upstash/redis" icon="node-js" iconType="brands">

```ts
import { Redis } from "@upstash/redis";

const redis = Redis.fromEnv();

await redis.zadd(
    "key1",
    { score: 1, member: "member1" },
)
await redis.zadd(
    "key2",
    { score: 1, member: "member1" },
    { score: 2, member: "member2" },
)

const res = await redis.zinterstore("destination", 2, ["key1", "key2"]);
console.log(res) // 1
```

</Accordion>

<Accordion title="upstash_redis" icon="python" iconType="brands">

```python
from upstash_redis import Redis

redis = Redis.from_env()
result = redis.zinterstore("destination-key", ["my-key"])
print(result)
```

</Accordion>

<Accordion title="ioredis" icon="node-js" iconType="brands">

```ts
import Redis from "ioredis";

const redis = new Redis(process.env.REDIS_URL!);
const result = await redis.zinterstore("destination-key", "1", "my-key");
console.log(result);
```

</Accordion>

<Accordion title="node-redis" icon="node-js" iconType="brands">

```ts
import { createClient } from "redis";

const client = await createClient({ url: process.env.REDIS_URL })
  .on("error", console.error)
  .connect();
const result = await client.zInterStore("destination-key", "my-key");
console.log(result);
```

</Accordion>

<Accordion title="redis-py" icon="python" iconType="brands">

```python
import os
import redis

client = redis.from_url(os.environ["REDIS_URL"])
result = client.zinterstore("destination-key", ["my-key"])
print(result)
```

</Accordion>

<Accordion title="go-redis" icon="golang" iconType="brands">

```go
package main

import (
    "context"
    "fmt"
    "os"

    "github.com/redis/go-redis/v9"
)

func main() {
    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))
    if err != nil {
        panic(err)
    }
    client := redis.NewClient(opts)
    result, err := client.ZInterStore(context.Background(), "destination-key", &redis.ZStore{Keys: []string{"my-key"}}).Result()
    if err != nil {
        panic(err)
    }
    fmt.Println(result)
}
```

</Accordion>

<Accordion title="jedis" icon="java" iconType="brands">

```java
import java.net.URI;

import redis.clients.jedis.Jedis;

try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {
  Object result = jedis.zinterstore("destination-key", "my-key");
  System.out.println(result);
}
```

</Accordion>

<Accordion title="redis-rs" icon="rust" iconType="brands">

```rust
use redis::TypedCommands;

fn main() -> redis::RedisResult<()> {
    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");
    let client = redis::Client::open(url)?;
    let mut connection = client.get_connection()?;

    let result = connection.zinterstore("destination-key", &["my-key"])?;
    println!("{result:?}");
    Ok(())
}
```

</Accordion>

</AccordionGroup>