zcount
ZCOUNT by score
Count members in a score range
Usage: zcount key min max.
To count all members, use -inf for min and +inf for max.
min and max are inclusive.
Example
| Command> | zadd myzip 992 "Seoul" 342 "Busan" 246 "Daegu" 282 "Incheon" 151 "Gwangju" 1213 "Gyeonggi" |
| Result> | 6 |
| Command> | zadd myzip 150 "Gangwon" 206 "Chungnam" 264 "Gyeongbuk" 57 "Jeju" |
| Result> | 4 |
| Command> | zcount myzip -inf +inf Number of all members in the set |
| Result> |
10
|
| Command> | zcount myzip 300 +inf
Number of cities/provinces with population of 3 million or more |
| Result> |
3
|
| Command> | zcount myzip 200 299
Number of cities/provinces with population between 2.00 and 2.99 million |
| Result> |
4
|
| Command> | zcount myzip -inf 199
Number of cities/provinces with population of 1.99 million or less |
| Result> |
3
|
View animation
Syntax
ZCOUNT key min max
- Available since version 2.0.0.
- Time complexity is O(log(N)). N is the number of members in the set.
Commands
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