Redis的Zset数据类型及常用命令(有序集合)
有续集和的底层数据结构是跳跃链表
在set的基础上增加了一个值，set k1 v1，zset k1 score v1
ZADD 添加数据
ZRANGE 获取以下标长度的数据
127.0.0.1:6379> ZADD set 1 one (integer) 1 127.0.0.1:6379> ZADD set 2 two 3 three (integer) 2 127.0.0.1:6379> ZRANGE set 0 -1 1) "one" 2) "two" 3) "three"
ZRANGEBYSCORE升序排序，-inf代表负无穷，+inf代表正无穷
127.0.0.1:6379> ZADD set 1 one (integer) 1 127.0.0.1:6379> ZADD set 2 two 3 three (integer) 2 127.0.0.1:6379> ZRANGEBYSCORE set -inf +inf 1) "one" 2) "two" 3) "three" 127.0.0.1:6379> ZRANGEBYSCORE set -inf +inf withscores 1) "one" 2) "1" 3) "two" 4) "2" 5) "three" 6) "3"
ZRANGEBYSCORE降序排序，-inf代表负无穷，+inf代表正无穷
127.0.0.1:6379> ZREVRANGEBYSCORE set 3 1 1) "three" 2) "two" 3) "one" 127.0.0.1:6379> ZREVRANGEBYSCORE set 3 1 withscores 1) "three" 2) "3" 3) "two" 4) "2" 5) "one" 6) "1" 127.0.0.1:6379> ZREVRANGEBYSCORE set +inf -inf withscores 1) "three" 2) "3" 3) "two" 4) "2" 5) "one" 6) "1"
ZREM删除元素
127.0.0.1:6379> ZREM set two (integer) 1 127.0.0.1:6379> ZRANGE set 0 -1 1) "one" 2) "three"
获取集合中的个数
127.0.0.1:6379> ZCARD set (integer) 2
获取指定区间的成员数量
127.0.0.1:6379> ZCOUNT set 1 2 (integer) 2
学习参考狂神说java
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