ZUNION numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX] [WITHSCORES]

This command is similar to ZUNIONSTORE, but instead of storing the resulting sorted set, it is returned to the client.

For a description of the `WEIGHTS`

and `AGGREGATE`

options, see ZUNIONSTORE.

Array reply: the result of union (optionally with their scores, in case the `WITHSCORES`

option is given).

redis> ZADD zset1 1 "one"

`(integer) 1`

redis> ZADD zset1 2 "two" `(integer) 1`

redis> ZADD zset2 1 "one" `(integer) 1`

redis> ZADD zset2 2 "two" `(integer) 1`

redis> ZADD zset2 3 "three" `(integer) 1`

redis> ZUNION 2 zset1 zset2 ```
1) "one"
2) "three"
3) "two"
```

redis> ZUNION 2 zset1 zset2 WITHSCORES ```
1) "one"
2) "2"
3) "three"
4) "3"
5) "two"
6) "4"
```

© 2009–2020 Salvatore Sanfilippo

Licensed under the Creative Commons Attribution-ShareAlike License 4.0.

https://redis.io/commands/zunion