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.

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

redis> ZADD myzset 0 a 0 b 0 c 0 d 0 e

`(integer) 5`

redis> ZADD myzset 0 f 0 g `(integer) 2`

redis> ZLEXCOUNT myzset - + `(integer) 7`

redis> ZLEXCOUNT myzset [b [f `(integer) 5`

© 2009–2020 Salvatore Sanfilippo

Licensed under the Creative Commons Attribution-ShareAlike License 4.0.

https://redis.io/commands/zlexcount