📅 最后修改于: 2020-11-26 07:04:09 🧑 作者: Mango
Redis Sorted Sets与Redis Sets相似，具有存储在集合中的值的独特功能。不同之处在于，排序集的每个成员都与一个分数相关联，该分数用于从最小到最大分数中获取排序的排序集。
在Redis排序集中，添加，删除并测试O(1)中成员的存在(恒定时间，无论该集合中包含的元素数量如何)。列表的最大长度为2个32 – 1元件(4294967295，超过4十亿每组元素)。
redis 127.0.0.1:6379> ZADD tutorials 1 redis
(integer) 1
redis 127.0.0.1:6379> ZADD tutorials 2 mongodb
(integer) 1
redis 127.0.0.1:6379> ZADD tutorials 3 mysql
(integer) 1
redis 127.0.0.1:6379> ZADD tutorials 3 mysql
(integer) 0
redis 127.0.0.1:6379> ZADD tutorials 4 mysql
(integer) 0
redis 127.0.0.1:6379> ZRANGE tutorials 0 10 WITHSCORES
1) "redis"
2) "1"
3) "mongodb"
4) "2"
5) "mysql"
6) "4"
在上面的示例中，通过命令ZADD将三个带有其分数的值插入到名为“ tutorials”的Redis排序集中。
下表列出了一些与排序集相关的基本命令。
| Sr.No | Command & Description |
|---|---|
| 1 | ZADD key score1 member1 [score2 member2]
Adds one or more members to a sorted set, or updates its score, if it already exists |
| 2 | ZCARD key
Gets the number of members in a sorted set |
| 3 | ZCOUNT key min max
Counts the members in a sorted set with scores within the given values |
| 4 | ZINCRBY key increment member Increments the score of a member in a sorted set |
| 5 | ZINTERSTORE destination numkeys key [key …]
Intersects multiple sorted sets and stores the resulting sorted set in a new key |
| 6 | ZLEXCOUNT key min max
Counts the number of members in a sorted set between a given lexicographical range |
| 7 | ZRANGE key start stop [WITHSCORES]
Returns a range of members in a sorted set, by index |
| 8 | ZRANGEBYLEX key min max [LIMIT offset count]
Returns a range of members in a sorted set, by lexicographical range |
| 9 | ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT]
Returns a range of members in a sorted set, by score |
| 10 | ZRANK key member
Determines the index of a member in a sorted set |
| 11 | ZREM key member [member …]
Removes one or more members from a sorted set |
| 12 | ZREMRANGEBYLEX key min max
Removes all members in a sorted set between the given lexicographical range |
| 13 | ZREMRANGEBYRANK key start stop
Removes all members in a sorted set within the given indexes |
| 14 | ZREMRANGEBYSCORE key min max
Removes all members in a sorted set within the given scores |
| 15 | ZREVRANGE key start stop [WITHSCORES]
Returns a range of members in a sorted set, by index, with scores ordered from high to low |
| 16 | ZREVRANGEBYSCORE key max min [WITHSCORES]
Returns a range of members in a sorted set, by score, with scores ordered from high to low |
| 17 | ZREVRANK key member
Determines the index of a member in a sorted set, with scores ordered from high to low |
| 18 | ZSCORE key member
Gets the score associated with the given member in a sorted set |
| 19 | ZUNIONSTORE destination numkeys key [key …]
Adds multiple sorted sets and stores the resulting sorted set in a new key |
| 20 | ZSCAN key cursor [MATCH pattern] [COUNT count]
Incrementally iterates sorted sets elements and associated scores |