ZUNION

Usage:

ZUNION numkeys key [ key ...] [ WEIGHTS weight ] [ [ WEIGHTS weight ] ...] [ AGGREGATE sum | min | max ] [ withscores ]

Complexity:

O(N)+O(M*log(M)) with N being the sum of the sizes of the input sorted sets, and M being the number of elements in the resulting sorted set.

Since:

6.2.0

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.

Examples

ZADD zset1 1 "one"
ZADD zset1 2 "two"
ZADD zset2 1 "one"
ZADD zset2 2 "two"
ZADD zset2 3 "three"
ZUNION 2 zset1 zset2
ZUNION 2 zset1 zset2 WITHSCORES