ZRANK · Valkey

ZRANK

Returns the index of a member in a sorted set ordered by ascending scores.

Usage

ZRANK key member [WITHSCORE]

Description

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.

The optional WITHSCORE argument supplements the command’s reply with the score of the element returned.

Use ZREVRANK to get the rank of an element with the scores ordered from high to low.

Reply RESP2

One of the following:

Reply RESP3

One of the following:

Complexity

O(log(N))

ACL Categories

@fast @read @sortedset

Examples

127.0.0.1:6379> ZADD myzset 1 "one"
(integer) 1
127.0.0.1:6379> ZADD myzset 2 "two"
(integer) 1
127.0.0.1:6379> ZADD myzset 3 "three"
(integer) 1
127.0.0.1:6379> ZRANK myzset "three"
(integer) 2
127.0.0.1:6379> ZRANK myzset "four"
(nil)
127.0.0.1:6379> ZRANK myzset "three" WITHSCORE
1) (integer) 2
2) "3"
127.0.0.1:6379> ZRANK myzset "four" WITHSCORE
(nil)

History

See also

BZMPOP, BZPOPMAX, BZPOPMIN, ZADD, ZCARD, ZCOUNT, ZDIFF, ZDIFFSTORE, ZINCRBY, ZINTER, ZINTERCARD, ZINTERSTORE, ZLEXCOUNT, ZMPOP, ZMSCORE, ZPOPMAX, ZPOPMIN, ZRANDMEMBER, ZRANGE, ZRANGESTORE, ZREM, ZREMRANGEBYLEX, ZREMRANGEBYRANK, ZREMRANGEBYSCORE, ZREVRANK, ZSCAN, ZSCORE, ZUNION, ZUNIONSTORE.