ZDIFF

Syntax
ZDIFF numkeys key [key ...] [WITHSCORES]
Available since:
6.2.0
Time complexity:
O(L + (N-K)log(N)) worst case where L is the total number of elements in all the sets, N is the size of the first set, 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.

Examples

redis> ZADD zset1 1 "one"
(integer) 1
redis> ZADD zset1 2 "two"
(integer) 0
redis> ZADD zset1 3 "three"
1) "Hello"
2) "there"
3) (nil)
redis> ZADD zset1 1 "one"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> ZADD zset1 2 "two"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> ZADD zset1 3 "three"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> ZADD zset2 1 "one"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> ZADD zset2 2 "two"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> ZDIFF 2 zset1 zset2
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> ZDIFF 2 zset1 zset2 WITHSCORES
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis>

RESP2/RESP3 Reply

  • Array reply: the result of the difference including, optionally, scores when the WITHSCORES option is used.

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