Returns all the elements in the sorted set at
key with a score between
max (including elements with score equal to
The elements are considered to be ordered from low to high scores.
The elements having the same score are returned in lexicographical order (this follows from a property of the sorted set implementation in Redis and does not involve further computation).
LIMIT argument can be used to only get a range of the matching
elements (similar to SELECT LIMIT offset, count in SQL).
Keep in mind that if
offset is large, the sorted set needs to be traversed for
offset elements before getting to the elements to return, which can add up to
O(N) time complexity.
WITHSCORES argument makes the command return both the element and
its score, instead of the element alone.
This option is available since Redis 2.0.
Exclusive intervals and infinity
max can be
+inf, so that you are not required to know
the highest or lowest score in the sorted set to get all elements from or up to
a certain score.
By default, the interval specified by
max is closed (inclusive).
It is possible to specify an open interval (exclusive) by prefixing the score
with the character
ZRANGEBYSCORE zset (1 5
Will return all elements with
1 < score <= 5 while:
ZRANGEBYSCORE zset (5 (10
Will return all the elements with
5 < score < 10 (5 and 10 excluded).
Array reply: list of elements in the specified score range (optionally with their scores).
(integer) 1redis> ZADD myzset 2 "two"
(integer) 1redis> ZADD myzset 3 "three"
(integer) 1redis> ZRANGEBYSCORE myzset -inf +inf
1) "one" 2) "two" 3) "three"redis> ZRANGEBYSCORE myzset 1 2
1) "one" 2) "two"redis> ZRANGEBYSCORE myzset (1 2
1) "two"redis> ZRANGEBYSCORE myzset (1 (2
(empty list or set)