ZRANK (original) (raw)

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Syntax

ZRANK key member [WITHSCORE]

Available since:

Redis Open Source 2.0.0

Time complexity:

O(log(N))

ACL categories:

@read, @sortedset, @fast,

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.

Examples

ZADD myzset 1 "one" ZADD myzset 2 "two" ZADD myzset 3 "three" ZRANK myzset "three" ZRANK myzset "four" ZRANK myzset "three" WITHSCORE ZRANK myzset "four" WITHSCORE

RESP2 Reply

One of the following:

• Nil reply: if the key does not exist or the member does not exist in the sorted set.
• Integer reply: the rank of the member when WITHSCORE is not used.
• Array reply: the rank and score of the member when WITHSCORE is used.

RESP3 Reply

One of the following:

• Null reply: if the key does not exist or the member does not exist in the sorted set.
• Integer reply: the rank of the member when WITHSCORE is not used.
• Array reply: the rank and score of the member when WITHSCORE is used.

History

• Starting with Redis version 7.2.0: Added the optional WITHSCORE argument.