ZLEXCOUNT
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.
Return value
Integer reply: the number of elements in the specified score range.
Examples
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