zlexcount.3valkey - Man Page

ZLEXCOUNT key min max

When all the elements in a sorted set are inserted with the same score, in order to force lexicographical ordering, this command returns the number of elements in the sorted set at key with a value between min and max.

The min and max arguments have the same meaning as described for ZRANGEBYLEX.

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.

valkey-protocol(7) Integer reply: the number of members in the specified score range.

O(log(N)) with N being the number of elements in the sorted set.

@fast @read @sortedset

• Available since: 2.8.9

127.0.0.1:6379> ZADD myzset 0 a 0 b 0 c 0 d 0 e
(integer) 5
127.0.0.1:6379> ZADD myzset 0 f 0 g
(integer) 2
127.0.0.1:6379> ZLEXCOUNT myzset - +
(integer) 7
127.0.0.1:6379> ZLEXCOUNT myzset [b [f
(integer) 5

bzmpop(3valkey), bzpopmax(3valkey), bzpopmin(3valkey), zadd(3valkey), zcard(3valkey), zcount(3valkey), zdiff(3valkey), zdiffstore(3valkey), zincrby(3valkey), zinter(3valkey), zintercard(3valkey), zinterstore(3valkey), zmpop(3valkey), zmscore(3valkey), zpopmax(3valkey), zpopmin(3valkey), zrandmember(3valkey), zrange(3valkey), zrangestore(3valkey), zrank(3valkey), zrem(3valkey), zremrangebylex(3valkey), zremrangebyrank(3valkey), zremrangebyscore(3valkey), zrevrank(3valkey), zscan(3valkey), zscore(3valkey), zunion(3valkey), zunionstore(3valkey)