Removes one or more members from a set. Deletes the set if the last member was removed.
SREM
key member [member…]
Remove the specified members from the set stored at key
. Specified members that are not a member of this set are ignored. If key
does not exist, it is treated as an empty set and this command returns 0
.
An error is returned when the value stored at key
is not a set.
Integer reply: the number of members that were removed from the set, not including non existing members.
Integer reply: Number of members that were removed from the set, not including non existing members.
O(N) where N is the number of members to be removed.
@fast @set @write
127.0.0.1:6379> SADD myset "one"
(integer) 1
127.0.0.1:6379> SADD myset "two"
(integer) 1
127.0.0.1:6379> SADD myset "three"
(integer) 1
127.0.0.1:6379> SREM myset "one"
(integer) 1
127.0.0.1:6379> SREM myset "four"
(integer) 0
127.0.0.1:6379> SMEMBERS myset
1) "two"
2) "three"
member
arguments.SADD, SCARD, SDIFF, SDIFFSTORE, SINTER, SINTERCARD, SINTERSTORE, SISMEMBER, SMEMBERS, SMISMEMBER, SMOVE, SPOP, SRANDMEMBER, SSCAN, SUNION, SUNIONSTORE.