ZRANK key member
相关命令
- ZADD
- ZCARD
- ZCOUNT
- ZINCRBY
- ZINTERSTORE
- ZLEXCOUNT
- ZRANGE
- ZRANGEBYLEX
- ZRANGEBYSCORE
- ZRANK
- ZREM
- ZREMRANGEBYLEX
- ZREMRANGEBYRANK
- ZREMRANGEBYSCORE
- ZREVRANGE
- ZREVRANGEBYSCORE
- ZREVRANK
- ZSCAN
- ZSCORE
- ZUNIONSTORE
Available since 2.0.0.
时间复杂度: O(log(N))
Returns the rank of member
in the sorted set stored at key
, with the scores ordered from low to high. The rank (or index) is 0-based, which means that the member with the lowest score has rank 0
.
Use ZREVRANK to get the rank of an element with the scores ordered from high to low.
返回值
- If
member
exists in the sorted set, Integer reply: the rank ofmember
. - If
member
does not exist in the sorted set orkey
does not exist, Bulk string reply:nil
.
例子
redis> ZADD myzset 1 "one"
- (integer) 1
redis> ZADD myzset 2 "two"
- (integer) 1
redis> ZADD myzset 3 "three"
- (integer) 1
redis> ZRANK myzset "three"
- (integer) 2
redis> ZRANK myzset "four"
- (nil)
This website is open source software developed by Citrusbyte.
The Redis logo was designed by Carlos Prioglio. See more credits.