 Usage:

SINTERSTORE destination key [ key ... ]
 Complexity:
 O(N*M) worst case where N is the cardinality of the smallest set and M is the number of sets.
 Since:
 1.0.0
This command is equal to SINTER
, but instead of returning the resulting set,
it is stored in destination
.
If destination
already exists, it is overwritten.
Examples
127.0.0.1:6379> SADD key1 "a"
(integer) 1
127.0.0.1:6379> SADD key1 "b"
(integer) 1
127.0.0.1:6379> SADD key1 "c"
(integer) 1
127.0.0.1:6379> SADD key2 "c"
(integer) 1
127.0.0.1:6379> SADD key2 "d"
(integer) 1
127.0.0.1:6379> SADD key2 "e"
(integer) 1
127.0.0.1:6379> SINTERSTORE key key1 key2
(integer) 1
127.0.0.1:6379> SMEMBERS key
1) "c"