SDIFF key [key …]

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

    Returns the members of the set resulting from the difference between the first set and all the successive sets.

    For example:

    : list with members of the resulting set.

    *Examples

    redis> SADD key1 "a" 

    1. (integer) 1

    redis> SADD key1 "b"

      redis> SADD key2 "c"

      redis> SADD key2 "d" 

      1. (integer) 1

      redis> SADD key2 "e" 

      1. 2) "b"
      redis>