Reids中的有序集合Zset

左手的ㄟ右手 2024-03-26 21:35 84阅读 0赞

## 有序集合（ZSet） ##

#### 文章目录 ####

*  有序集合（ZSet）
 *   *  常用命令
     *   *  zadd
         *  zrevrange
         *  zrange
         *  zrangebyscore/zrevrangebyscore
         *  zscore
         *  zcard
         *  zrem
         *  zincrby
         *  zcount
         *  zmpop
         *  zrank /zrevrank

### 常用命令 ###

<table> 
 <thead> 
  <tr> 
   <th>命令</th> 
   <th>作用</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>zadd key score member</td> 
   <td>添加元素</td> 
  </tr> 
  <tr> 
   <td>zrevrange key start stop [withscores]</td> 
   <td>遍历从大到小元素</td> 
  </tr> 
  <tr> 
   <td>zrange key start stop [withscores]</td> 
   <td>遍历从小到大元素</td> 
  </tr> 
  <tr> 
   <td>zrangebyscore/zrevrangebyscore key min max [ withscores] [ LIMIT offset count]</td> 
   <td>获取从小到大或者从大到小指定范围的元素</td> 
  </tr> 
  <tr> 
   <td>zscore key</td> 
   <td>获取元素分数</td> 
  </tr> 
  <tr> 
   <td>zcard key</td> 
   <td>获取集合中元素的数量</td> 
  </tr> 
  <tr> 
   <td>zrem key 某个score下对于的value值</td> 
   <td>删除元素</td> 
  </tr> 
  <tr> 
   <td>zincrby key increment member</td> 
   <td>增加某个元素的分数</td> 
  </tr> 
  <tr> 
   <td>zcount key min max</td> 
   <td>获得指定分数范围内的元素个数</td> 
  </tr> 
  <tr> 
   <td>zmpop</td> 
   <td>从键名列表中的第一个非空排序集中弹出一个或者多个元素</td> 
  </tr> 
  <tr> 
   <td>zrank key values值</td> 
   <td>获取下标值</td> 
  </tr> 
  <tr> 
   <td>zrevrank key values值</td> 
   <td>逆序获得下标</td> 
  </tr> 
 </tbody> 
</table>

#### zadd ####

添加信息

127.0.0.1:6379> 
    127.0.0.1:6379> zadd zset1 60 v1 70 v2 80 v3 90 v4 100 v5
    (integer) 5

#### zrevrange ####

遍历从大到小

127.0.0.1:6379> zrevrange zset1 0 -1 withscores
     1) "v5"
     2) "100"
     3) "v4"
     4) "90"
     5) "v3"
     6) "80"
     7) "v2"
     8) "70"
     9) "v1"
    10) "60"

#### zrange ####

遍历从小到大

127.0.0.1:6379> zrange zset1 0 -1 withscores
     1) "v1"
     2) "60"
     3) "v2"
     4) "70"
     5) "v3"
     6) "80"
     7) "v4"
     8) "90"
     9) "v5"
    10) "100"

#### zrangebyscore/zrevrangebyscore ####

获取从小到大或者从大到小指定范围的元素

127.0.0.1:6379> zrange zset1 0 -1 withscores
     1) "v1"
     2) "60"
     3) "v2"
     4) "70"
     5) "v3"
     6) "80"
     7) "v4"
     8) "90"
     9) "v5"
    10) "100"
    127.0.0.1:6379> zrangebyscore zset1 60 90 
    1) "v1"
    2) "v2"
    3) "v3"
    4) "v4"
    127.0.0.1:6379> zrangebyscore zset1 60 90 withscores
    1) "v1"
    2) "60"
    3) "v2"
    4) "70"
    5) "v3"
    6) "80"
    7) "v4"
    8) "90"
    127.0.0.1:6379> zrangebyscore zset1 (60 90 withscores
    1) "v2"
    2) "70"
    3) "v3"
    4) "80"
    5) "v4"
    6) "90"
    127.0.0.1:6379> zrangebyscore zset1 (60 90 withscores limit 0 2
    1) "v2"
    2) "70"
    3) "v3"
    4) "80"

#### zscore ####

获取元素的分数

127.0.0.1:6379> zscore zset1 v5
    "100"

#### zcard ####

获取集合中元素的数量

127.0.0.1:6379> zcard zset1
    (integer) 5

#### zrem ####

删除元素

127.0.0.1:6379> zrem zset1 v5
    (integer) 1

#### zincrby ####

增加某个元素的分数

127.0.0.1:6379> zincrby zset1 3 v1
    "63"

#### zcount ####

获得指定分数范围内的元素个数

127.0.0.1:6379> zcount zset1 60 90
    (integer) 4

#### zmpop ####

从键名列表中的第一个非空排序集中弹出一个或者多个元素

127.0.0.1:6379> zmpop 1 zset1 min count 1
    1) "zset1"
    2) 1) 1) "v1"
          2) "63"
    127.0.0.1:6379> zrevrange zset1 0 -1
    1) "v4"
    2) "v3"
    3) "v2"

#### zrank /zrevrank ####

zrank key values值 获取下标值

zrevrank key values值 逆序获得下标

127.0.0.1:6379> zrange zset1 0 -1
    1) "v2"
    2) "v3"
    3) "v4"
    127.0.0.1:6379> zrank zset1 v2
    (integer) 0
    127.0.0.1:6379> zrevrank zset1 v2
    (integer) 2