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Redis - Sorted Set Zrank Command
Redis ZRANK command returns the rank of member in the sorted set stored at the 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.
Return Value
If the member exists in the sorted set, Integer reply: the rank of member.
If the member does not exist in the sorted set or the key does not exist, Bulk string reply − nil.
Syntax
Following is the basic syntax of Redis ZRANK command.
redis 127.0.0.1:6379> ZRANK key member
Example
redis 127.0.0.1:6379> ZADD myzset 0 a 1 b 2 c 3 d 4 e (integer) 5 redis 127.0.0.1:6379> ZADD myzset 5 f 6 g (integer) 2 redis 127.0.0.1:6379> ZRANK myzset b (integer) 1 redis 127.0.0.1:6379> ZRANK myzset t nil
redis_sorted_sets.htm
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