(10-7)redis -Sorted set 数据类型

谁借莪１个温暖的怀抱￠ 2022-08-08 06:39 130阅读 0赞

启动redis：
    [root@baozi ~]# redis-server /etc/redis.conf
    [root@baozi ~]# redis-cli
    127.0.0.1:6379>
    
    
    redis数据类型--sorted set
    1、有序集合，在集合类型的基础上为集合中的每一个元素都关联了一个分数，这样可以很方便的获取分数最高的N个元素（topN）;
    
    
    常用命令：
    1、zadd/zscore/zrange/zrevrange
    2、zrangebyscore
    3、zincrby/zcard/zcount
    4、zrem/zremrangebyrank/zremrangebyscore
    扩展： +inf（正无穷）  -inf(负无穷)
    
    
    //增加元素
    127.0.0.1:6379> zadd sset1 10 a
    (integer) 1
    127.0.0.1:6379> zadd sset1 20 b
    (integer) 1
    127.0.0.1:6379> zadd sset1 5 c
    (integer) 1
    
    //遍历元素
    127.0.0.1:6379> zrange sset1 0 -1
    1) "c"
    2) "a"
    3) "b"
    
    //遍历元素附带分值
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "c"
    2) "5"
    3) "a"
    4) "10"
    5) "b"
    6) "20"
    127.0.0.1:6379>
    
    
    //查看某个元素的分值
    127.0.0.1:6379> zscore sset1 a
    "10"
    
    //倒叙遍历所有元素
    127.0.0.1:6379> zrevrange sset1 0 -1
    1) "b"
    2) "a"
    3) "c"
    
    //倒叙遍历所有元素，附带分值
    127.0.0.1:6379> zrevrange sset1 0 -1 withscores
    1) "b"
    2) "20"
    3) "a"
    4) "10"
    5) "c"
    6) "5"
    127.0.0.1:6379>
    
    
    //显示指定分数段的元素，左闭右闭
    127.0.0.1:6379> zrangebyscore sset1 10 20
    1) "a"
    2) "b"
    
    //左开右闭
    127.0.0.1:6379> zrangebyscore sset1 (10 20
    1) "b"
    
    //显示指定分数段的元素，左闭右闭，附带分数
    127.0.0.1:6379> zrangebyscore sset1 10 20 withscores
    1) "a"
    2) "10"
    3) "b"
    4) "20"
    
    //显示指定分数段的元素，左闭右闭，从角标为1开始显示2个
    127.0.0.1:6379> zrangebyscore sset1 10 20 limit 1 2
    1) "b"
    
    //显示指定分数段的元素，左闭右闭，从角标为0开始显示2个
    127.0.0.1:6379> zrangebyscore sset1 10 20 limit 0 2
    1) "a"
    2) "b"
    127.0.0.1:6379>
    
    
    //增加指定元素的分值
    127.0.0.1:6379> zincrby sset1 4 c
    "9"
    127.0.0.1:6379> zrevrange sset1 0 -1 withscores
    1) "b"
    2) "20"
    3) "a"
    4) "10"
    5) "c"
    6) "9"
    
    //获得集合元素个数
    127.0.0.1:6379> zcard sset1
    (integer) 3
    
    //获取指定分数段元素的个数
    127.0.0.1:6379> zcount sset1 9 20
    (integer) 3
    127.0.0.1:6379> zcount sset1 (9 20
    (integer) 2
    127.0.0.1:6379>
    
    
    //删除指定元素
    127.0.0.1:6379> zrem sset1 a
    (integer) 1
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "c"
    2) "9"
    3) "b"
    4) "20"
    127.0.0.1:6379>
    
    
    
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "c"
    2) "9"
    3) "a"
    4) "10"
    5) "b"
    6) "20"
    7) "d"
    8) "25"
    //删除指定角标范围的元素
    127.0.0.1:6379> zremrangebyrank sset1 0 0
    (integer) 1
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "a"
    2) "10"
    3) "b"
    4) "20"
    5) "d"
    6) "25"
    //删除指定分数段的元素
    127.0.0.1:6379> zremrangebyscore sset1 5 15
    (integer) 1
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "b"
    2) "20"
    3) "d"
    4) "25"
    127.0.0.1:6379>
    
    
    //正无穷大
    127.0.0.1:6379> zadd sset1 +inf x
    (integer) 1
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "b"
    2) "20"
    3) "d"
    4) "25"
    5) "x"
    6) "inf"
    //负无穷大
    127.0.0.1:6379> zadd sset1 -inf y
    (integer) 1
    127.0.0.1:6379> zrange sset1 0 -1 withscores
    1) "y"
    2) "-inf"
    3) "b"
    4) "20"
    5) "d"
    6) "25"
    7) "x"
    8) "inf"
    127.0.0.1:6379>