【Redis学习笔记】08.Redis 有序集合基本操作

1. 有序集合常用命令

命令	含义	用法
ZADD	创建有序集合	ZADD key
ZCARD	查看有序集合成员格式	ZCARD key
SDIFF	查看成员	ZSCORE key member
ZRANK	按照降序查看成员名次	ZRANK key member
ZREVRANK	按照升序查看成员名次	ZREVRANK key member
ZREM	删除有序集合中成员	ZREM key member [member …]
ZRANGE	查看有序集合中指定范围集合	ZRANGE key start stop [WITHSCORES]
ZRANGEBYSCORE	返回指定分数范围的成员	ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]
ZINCRBY	增加成员分数	ZINCRBY key increment member

2. 添加有序集合

语法：

ZADD class1:redis 100 zhangsan
ZADD class1:redis 20 lisi
ZADD class1:redis 99 wangwu

3. 计算成员个数

语法：ZCARD key

127.0.0.1:6379> ZCARD class1:redis
(integer) 3

4. 查看成员分数

语法：ZSCORE key member

127.0.0.1:6379> ZSCORE class1:redis lisi
"20"

5. 按照降序查看成员名次（从0开始）

语法：ZRANK key member

127.0.0.1:6379> ZRANK class1:redis lisi
(integer) 0

6. 按照升序查看成员名次（从0开始）

语法：ZREVRANK key member

127.0.0.1:6379> ZREVRANK class1:redis lisi
(integer) 2

7. 删除成员

语法：ZREM key member [member ...]

127.0.0.1:6379> ZREM  class1:redis lisi
(integer) 1

8. 返回指定排名范围的成员

语法：ZRANGE key start stop [WITHSCORES]

127.0.0.1:6379> ZRANGE class1:redis 0 -1
1) "wangwu"
2) "zhangsan"
127.0.0.1:6379> ZRANGE class1:redis 0 -1 WITHSCORES
1) "wangwu"
2) "99"
3) "zhangsan"
4) "100"

9. 返回指定分数范围的成员

语法：ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]

127.0.0.1:6379> ZRANGEBYSCORE class1:redis 10 99
1) "wangwu"
127.0.0.1:6379> ZRANGEBYSCORE class1:redis 10 99 WITHSCORES
1) "wangwu"
2) "99"

10. 增加成员分数

语法：ZINCRBY key increment member

127.0.0.1:6379> ZINCRBY class1:redis 50 tom
"50"
127.0.0.1:6379> ZSCORE class1:redis tom
"50"