redis从入门到精通（七）———order set结构及命令讲解

Order set结构及命令详解

 

1、zadd key score1 value1 score2 key2 …

添加元素

127.0.0.1:6379> zadd class 12 lily 13 lucy 18 lilei 6 poly

(integer) 4

 

2、zrem key value1 value2…

删除集合中的元素

127.0.0.1:6379> zrem class lily

(integer) 1

 

3、zremrangebyscore key min max

按照score来删除元素，删除scare在【min，max】之间的

 

 

4、zrange key start stop [withscores]

把集合排序后返回名次[start,stop],默认升序

127.0.0.1:6379> zrange class 0 3

1) "poly"

2) "lucy"

3) "lilei"

 

127.0.0.1:6379> zrange class 1 3 withscores

1) "lucy"

2) "13"

3) "lilei"

4) "18"

 

5、zrangebyscore key min max [withscore] limit offset N

集合（升序）排列后，取score在【main，max】内的元素,并跳过offset个，取n个

127.0.0.1:6379> zrangebyscore class 13 18

1) "lucy"

2) "lilei"

 

127.0.0.1:6379> zrangebyscore class 1 20 limit 1 2

1) "lucy"

2) "lilei"

 

127.0.0.1:6379> zrangebyscore class 1 20 withscores limit 1 2

1) "lucy"

2) "13"

3) "lilei"

4) "18"

 

6、zrank key member

查询member的排名（升序0开始）

127.0.0.1:6379> zrank class lily

(nil)

127.0.0.1:6379> zrank class lucy

(integer) 1

127.0.0.1:6379> zrank class lilei

(integer) 2

 

7、zrevrank key member

查询member的排名（降序0开始）

127.0.0.1:6379> zrank class lilei

(integer) 2

127.0.0.1:6379> zrevrank class lucy

(integer) 1

127.0.0.1:6379> zrevrank class lilei

(integer) 0

 

8、zrevrange key start stop

把集合降序排雷，取score在【max，min】之间的元素

127.0.0.1:6379> zrevrange class 0 2

1) "lilei"

2) "lucy"

3) "poly"

127.0.0.1:6379> zrevrange class 0 2 withscores

1) "lilei"

2) "18"

3) "lucy"

4) "13"

5) "poly"

6) "6"

 

9、zrevrangebyscore key min max [withsscores] limit offset n

把集合降序排雷，取名字【start，stop】之间的元素

 

127.0.0.1:6379> zrevrangebyscore class 20 0 withscores limit 1 2

1) "lucy"

2) "13"

3) "poly"

4) "6"

 

10、zremrangebyscore key min max

按排名删除元素，删除score在【min，max】之间的

返回删除个数

127.0.0.1:6379> zremrangebyscore class 6 10

(integer) 1

 

11、zremrangebyrank key start end

按排名删除元素，删除名次在【start，end】之间的

127.0.0.1:6379> zremrangebyrank class 0 1

(integer) 2

 

12、zcount key min max

返回【min，max】区间内元素的数量

127.0.0.1:6379> zadd mcsca 24 ll 26 sd 27 dsa 35 ps

(integer) 4

127.0.0.1:6379> zcard mcsca

(integer) 4

127.0.0.1:6379> zcount mcsca 20 30

(integer) 3

 

13、zinterstore destination numbers key1 [key2…] [weights weight1 [weight2 …]] [aggregate sum|min|max]

求key1 key2的交集，key1 key2的权重分别是weight1 weight2

聚合方法用sum min max

聚合结果保存在dest中

numkeys 提供key个数

 

注意：如果有交集，交集元素又有score ， score怎么处理？

aggregate  sum->score相加， min求最小score， max求最大score

另：可以通过weight设置不同key的权重， 交集时score*weights

 

127.0.0.1:6379> zrange mcsca 0 -1

1) "ll"

2) "sd"

3) "dsa"

4) "ps"

127.0.0.1:6379> zrange dlyd 0 -1

1) "ss"

2) "ds"

3) "52"

127.0.0.1:6379> zadd dlyd 32 ll

(integer) 1

127.0.0.1:6379> zinterstore all 2 mcsca dlyd aggregate sum

(integer) 1

127.0.0.1:6379> zrange all 0 -1 withscores

1) "ll"

2) "56"

 

127.0.0.1:6379> zinterstore all 2 mcsca dlyd weights 1 2 aggregate sum

(integer) 1

127.0.0.1:6379> zrange all 0 -1 withscores

1) "ll"

2) "88"

 

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