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ZDIFF numkeys key [key ...] [WITHSCORES]

Time complexity: : O(L + K log K) worst case where L is the total number of elements in all the sets, and K is the size of the result set.

ACL categories: @read, @sortedset, @slow

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


Array reply: the result of the difference (optionally with their scores, in case the WITHSCORES option is given).


dragonfly> ZADD zset1 1 "one"
(integer) 1
dragonfly> ZADD zset1 2 "two"
(integer) 1
dragonfly> ZADD zset1 3 "three"
(integer) 1
dragonfly> ZADD zset2 1 "one"
(integer) 1
dragonfly> ZADD zset2 2 "two"
(integer) 1
dragonfly> ZDIFF 2 zset1 zset2
1) "three"