SDIFF key1 key2 ...keyN

Syntax

SDIFF key1 key2 ...keyN

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

127.0.0.1:6379> sadd set1 2 4 6 8 
(integer) 4 
127.0.0.1:6379> sadd set2 1 3 5 7 4 6 
(integer) 6 
127.0.0.1:6379> sadd set3 1 3 5 7 4 
(integer) 5 
127.0.0.1:6379> sdiff set1 set2 set3 
1) "2" 
2) "8" 

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