SDIFFSTORE

SDIFFSTORE destination key [key ...]

Available since:

1.0.0

Time complexity:

O(N) where N is the total number of elements in all given sets.

ACL categories:

@write, @set, @slow,

This command is equal to SDIFF, but instead of returning the resulting set, it is stored in destination.

If destination already exists, it is overwritten.

Examples

redis> SADD key1 "a"
(integer) 1
redis> SADD key1 "b"
(integer) 1
redis> SADD key1 "c"
(integer) 1
redis> SADD key2 "c"
(integer) 1
redis> SADD key2 "d"
(integer) 1
redis> SADD key2 "e"
(integer) 1
redis> SDIFFSTORE key key1 key2
(integer) 2
redis> SMEMBERS key
1) "a"
2) "b"

RESP2/RESP3 Reply