Redis 有序集合ZSET 基础函数

复习总结一下redis, 为之后的大规模分布式爬虫做准备
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目录

• 前戏
• 插入
  • zadd
• 查询
  • zrange
  • zcount
  • zscore
  • zrevrange
  • zrangebyscore
  • zrevrangebyscore
  • zrank
  • zrevrank
  • zcard
• 跟新
  • zincrby
• 删除
  • zrem
  • zremrangebyrank
  • zremrangebyscore
• 其他
  • zinterstore
  • zunionstore

前戏

进入命令行模式

redis-cli

查询所有key

127.0.0.1:6379> KEYS *
1) "proxies:universal"

查询key 存储在 redis服务器中的类型，确认是有序集合ZSET类型

127.0.0.1:6379> TYPE proxies:universal
zset

插入

zadd

语法：zadd key score member [[score member] [score member] ...]

解释：增加一个或多个member （根据score排序）到有序集key中，如果member已经存在，只更新score。返回增加member个数，不包含已经存在的member

127.0.0.1:6379> ZADD temp 100
127.0.0.1:6379> ZADD temp 10 haha

查询

zrange

语法：zrange key start stop [withscores]

解释：返回有序集key中指定范围（通过索引 start stop）的member[及其score]

127.0.0.1:6379> ZRANGE temp 0 -1 withscores # 类似于Python里的索引
1) "100"
2) "0"
3) "haha"
4) "10"

zcount

语法：zcount key min max

解释：统计key中score值介于min 和max之间的member个数

127.0.0.1:6379> ZCOUNT proxies:universal 90 100
(integer) 264

zscore

语法：zscore key member

解释：返回有集key中member的score

127.0.0.1:6379> ZSCORE proxies:universal 149.28.17.159:3128
"100"

zrevrange

语法：zrevrange key start stop [withscores]

解释：返回有序集key中指定范围[通过索引start stop]的member[及score]，返回member根据score按降序排列

127.0.0.1:6379> ZREVRANGE proxies:universal 200 205 WITHSCORES
 1) "110.243.24.21:9999"
 2) "97"
 3) "110.243.16.9:9999"
 4) "97"
 5) "110.243.15.222:9999"
 6) "97"
 7) "110.243.13.30:9999"
 8) "97"
 9) "110.243.1.53:9999"
10) "97"
11) "58.250.21.56:3128"
12) "96"

zrangebyscore

语法：zrangebyscore key min max [withscores] [limit offset count]

解释：返回有序集key中，score大于等于min并且小于等于max的member。返回结果按照score递增的次序排列。可选withscores决定返回结果集中仅仅返回member还是返回member和score；可选参数limit 指定返回结果的数量区间。

127.0.0.1:6379> ZRANGEBYSCORE proxies:universal 90 100 WITHSCORES LIMIT 1 5
 1) "110.243.1.192:9999"
 2) "91"
 3) "110.243.1.41:9999"
 4) "91"
 5) "148.70.251.117:8133"
 6) "91"
 7) "182.46.203.184:9999"
 8) "91"
 9) "192.46.231.208:8080"
10) "91"

zrevrangebyscore

语法：zrevrangescore key max min [withscores] [limit offset count]

解释：返回有序集key中score<=max并且score>=min 的元素，返回结果根据score从大到小顺序排列。可选参数withscores决定结果集中是否包含score，可选参数limit 指定返回结果集范围。很明显是与zrangebyscore相反的函数

127.0.0.1:6379> ZREVRANGEBYSCORE proxies:universal 92 90 WITHSCORES LIMIT 1 5
 1) "182.46.111.216:9999"
 2) "92"
 3) "171.35.212.72:9999"
 4) "92"
 5) "122.5.97.104:9999"
 6) "92"
 7) "118.212.106.139:9999"
 8) "92"
 9) "113.121.66.141:9999"
10) "92"

zrank

语法：zrank key member

解释：根据score从低到高，返回member在有序集中的index, 和Python中的索引是一样的

127.0.0.1:6379> ZRANGE proxies:universal 0 5
1) "1.197.203.14:8460"
2) "103.153.40.13:8080"
3) "110.243.13.118:9999"
4) "110.243.2.248:9999"
5) "110.243.3.170:9999"
6) "110.243.3.241:9999"
127.0.0.1:6379> ZRANK proxies:universal 1.197.203.14:8460
(integer) 0
127.0.0.1:6379> ZRANK proxies:universal 110.243.3.241:9999
(integer) 5

zrevrank

语法：zrevrank key member

解释：根据score从高到低排序，返回member在有序集key中的index，很明显是上面zrank的反序

127.0.0.1:6379> ZREVRANK proxies:universal 1.197.203.14:8460
(integer) 3655
127.0.0.1:6379> ZREVRANK proxies:universal 110.243.3.241:9999
(integer) 3650

zcard

语法：zcard key

解释：返回有序集key的基数，类似于Python集合的长度

127.0.0.1:6379> ZCARD proxies:universal
(integer) 3656

跟新

zincrby

语法：zincrby key increment member

解释：有序集key的member增加增量increment，返回增加后的score

127.0.0.1:6379> ZSCORE proxies:universal 103.153.40.13:8080
"1"
127.0.0.1:6379> ZINCRBY proxies:universal 9 103.153.40.13:8080
"10"
127.0.0.1:6379> ZSCORE proxies:universal 103.153.40.13:8080
"10"

删除

zrem

语法：zrem key member [member ...]

解释：移除有序集中的一个或多个member，返回移除member的个数

127.0.0.1:6379> ZSCORE proxies:universal 1.197.203.14:8460
"1"
127.0.0.1:6379> ZREM proxies:universal 1.197.203.14:8460
(integer) 1
127.0.0.1:6379> ZSCORE proxies:universal 1.197.203.14:8460
(nil)

zremrangebyrank

语法：zremrangebyrank key start stop

解释：移除有序集中指定排名范围【start stop】的元素，返回移除元素个数

127.0.0.1:6379> ZRANGE proxies:universal 0 5 WITHSCORES
 1) "103.153.40.13:8080"
 2) "1"
 3) "110.243.13.118:9999"
 4) "1"
 5) "110.243.2.248:9999"
 6) "1"
 7) "110.243.3.170:9999"
 8) "1"
 9) "110.243.3.241:9999"
10) "1"
11) "110.243.4.86:8232"
12) "1"
127.0.0.1:6379> ZREMRANGEBYRANK proxies:universal 0 5
(integer) 6
127.0.0.1:6379> ZRANGE proxies:universal 0 5 WITHSCORES
 1) "110.243.5.104:9999"
 2) "1"
 3) "112.95.22.17:8820"
 4) "1"
 5) "113.121.36.100:8236"
 6) "1"
 7) "113.121.36.100:8772"
 8) "1"
 9) "113.121.36.100:8856"
10) "1"
11) "113.121.73.60:9999"
12) "1"

zremrangebyscore

语法：zremrangebyscore key min max

解释：移除有序集中的member，移除member的score大于等于min小于等于max；返回移除元素个数

127.0.0.1:6379> ZRANGEBYSCORE proxies:universal 1 5 WITHSCORES LIMIT 1 5
 1) "112.95.22.17:8820"
 2) "1"
 3) "113.121.36.100:8236"
 4) "1"
 5) "113.121.36.100:8772"
 6) "1"
 7) "113.121.36.100:8856"
 8) "1"
 9) "113.121.73.60:9999"
10) "1"
127.0.0.1:6379> ZREMRANGEBYSCORE proxies:universal 1 5
(integer) 1450

其他

zinterstore

语法：zinterstore destination numkeys key[key...] [weights weight] [aggregate sum|min|max]

解释：统计多个有序集的交集

zunionstore

语法：zunionstore destination numkeys key[key...] [weights weight] [aggregate sum|min|max]

解释：统计多个有序集的并集