ZCOUNT key min max
Available since:
Time complexity:
O(log(N)) with N being the number of elements in the sorted set.
ACL categories:
@read, @sortedset, @fast,

Returns the number of elements in the sorted set at key with a score between min and max.

The min and max arguments have the same semantic as described for ZRANGEBYSCORE.

Note: the command has a complexity of just O(log(N)) because it uses elements ranks (see ZRANK) to get an idea of the range. Because of this there is no need to do a work proportional to the size of the range.


Integer reply: the number of elements in the specified score range.


ZADD myzset 1 "one" ZADD myzset 2 "two" ZADD myzset 3 "three" ZCOUNT myzset -inf +inf ZCOUNT myzset (1 3


If you've found issues on this page, or have suggestions for improvement, please submit a request to merge or open an issue in the repository.