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06.有序集合操作.md

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1. zadd 往有序集合添加成员

zadd key score1 key2 score2 key2 ...
# 往有序集合key添加成员

# 示例
127.0.0.1:6379> zadd ages 28 zhangsan 24 lisi 26 wangwu
(integer) 0
127.0.0.1:6379> zrange ages 0 -1
1) "lisi"
2) "wangwu"
3) "zhangsan"

2. zrange 按名次取成员

zrange key start stop [WITHSCORES]
# 把集合排序后，返回名次[start,stop]的成员按名次取成员
# 默认是升续排列，withscores 是把score也打印出来

# 示例
127.0.0.1:6379> zrange ages 0 -1 withscores
1) "lisi"
2) "24"
3) "wangwu"
4) "26"
5) "zhangsan"
6) "28"

3. zrangebyscore 按分数取成员

zrangebyscore  key min max [withscores] limit offset N
# 集合(升序)排序后，取score在[min,max]内的成员，并跳过offset个，取出N个，按分数取成员

# 示例
127.0.0.1:6379> zadd ages 28 zhangsan 24 lisi 26 wangwu
(integer) 3
127.0.0.1:6379> zrangebyscore ages 25 30
1) "wangwu"
2) "zhangsan"
127.0.0.1:6379> zrangebyscore ages 25 30 limit 1 1
1) "zhangsan"

4. zscore 获取指定成员的分数

ZSCORE key member
# 获取指定成员的分数

# 示例
127.0.0.1:6379> zadd height 175 zhangsan 167 lisi 185 wangwu
(integer) 3
127.0.0.1:6379> zscore height lisi
"167"

5. zcount 计算分数区间成员个数

zcount key min max
# 计算[min,max]区间内成员的数量

# 示例
127.0.0.1:6379> zadd height 175 zhangsan 167 lisi 185 wangwu
(integer) 3
127.0.0.1:6379> zcount height 170 180
(integer) 1

6. zrank/zrevrank 获取成员升序/降序的排名

zrank/zrevrank key member
# 查询member的升序/降序排名，名次从0开始

# 示例
127.0.0.1:6379> zadd ages 28 zhangsan 24 lisi 26 wangwu
(integer) 0
127.0.0.1:6379> zrange ages 0 -1
1) "lisi"
2) "wangwu"
3) "zhangsan"
127.0.0.1:6379> zrank ages zhangsan
(integer) 2
127.0.0.1:6379> zrevrank ages zhangsan
(integer) 0

7. zrem 删除有序集合成员

zrem key value1 value2 ..
# 删除集合中的成员

# 示例
127.0.0.1:6379> zrem ages wangwu
(integer) 1
127.0.0.1:6379> zrange ages 0 -1
1) "lisi"
2) "zhangsan"

8. zremrangebyrank 按排名删除成员

zremrangebyrank key start end
# 按排名删除成员，删除名次在[start,end]之间的

# 示例
127.0.0.1:6379> zadd height 175 zhangsan 167 lisi 185 wangwu 178 zhaoliu
(integer) 1
127.0.0.1:6379> zremrangebyrank height 0 1
(integer) 2
127.0.0.1:6379> zrange height 0 -1
1) "zhaoliu"
2) "wangwu"

9. zremrangebyscore 按分数删除成员

zremrangebyscore key min max
# 按照socre来删除成员，删除score在[min,max]之间的

# 示例
127.0.0.1:6379> zadd height 175 zhangsan 167 lisi 185 wangwu 178 zhaoliu
(integer) 2
127.0.0.1:6379> zremrangebyscore height 170 180
(integer) 2
127.0.0.1:6379> zrange height 0 -1
1) "lisi"
2) "wangwu"

10. zinterstore 求交集再计算

zinterstore destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [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
# 聚合的结果保存在destination集合内

# 示例
127.0.0.1:6379> zadd zhangsan 5 iphone6s 7 galaxyS7 6 huaweiP9
(integer) 3
127.0.0.1:6379> zadd lisi 3 iphone6s 9 galaxyS7 4 huaweiP9 2 HTC10
(integer) 4
127.0.0.1:6379> zinterstore result 2 zhangsan lisi
(integer) 3
127.0.0.1:6379> zrange result 0 -1 withscores
1) "iphone6s"
2) "8"
3) "huaweiP9"
4) "10"
5) "galaxyS7"
6) "16"
127.0.0.1:6379> zinterstore result 2 zhangsan lisi aggregate max
(integer) 3
127.0.0.1:6379> zrange result 0 -1 withscores
1) "iphone6s"
2) "5"
3) "huaweiP9"
4) "6"
5) "galaxyS7"
6) "9"

11. zunionstore 求并集再计算

zunionstore destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]
# 求key1、key2...的并集，key1、key2...的权重分别是 weight1、weight2...
# 聚合方法用: sum|min|max
# 聚合的结果保存在destination集合内

# 示例
127.0.0.1:6379> zadd zhangsan 4 iphone6s 6 huaweiP9 8 xiaomi5
(integer) 3
127.0.0.1:6379> zadd lisi 2 iphone6s 8 galaxS7 5 meizu6
(integer) 3
127.0.0.1:6379> zunionstore result 2 zhangsan lisi
(integer) 5
127.0.0.1:6379> zrange result 0 -1 withscores
 1) "meizu6"
 2) "5"
 3) "huaweiP9"
 4) "6"
 5) "iphone6s"
 6) "6"
 7) "galaxS7"
 8) "8"
 9) "xiaomi5"
10) "8"
127.0.0.1:6379> zunionstore result 2 zhangsan lisi aggregate max
(integer) 5
127.0.0.1:6379> zrange result 0 -1 withscores
 1) "iphone6s"
 2) "4"
 3) "meizu6"
 4) "5"
 5) "huaweiP9"
 6) "6"
 7) "galaxS7"
 8) "8"
 9) "xiaomi5"
10) "8"