Stores the intersect of multiple sets in a key.
SINTERSTORE
destination
key [key…]
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.
Integer reply: the number of elements in the resulting set.
Integer reply: the number of the elements in the result set.
O(N*M) worst case where N is the cardinality of the smallest set and M is the number of sets.
@set @slow @write
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"
SADD, SCARD, SDIFF, SDIFFSTORE, SINTER, SINTERCARD, SISMEMBER, SMEMBERS, SMISMEMBER, SMOVE, SPOP, SRANDMEMBER, SREM, SSCAN, SUNION, SUNIONSTORE.