概念：Redis是用C语言开发的一个开源的高性能键值对数据库。

特征：

• 数据间没有必然的联系
• 内部采用单线程机制进行工作
• 高性能
• 多数据类型支持字符串类型 String列表类型 List散列类型 Map集合类型 Set有序集合类型 SortedSet
• 持久化支持

应用场景

• 为热点数据加速查询；如：热点商品、热点新闻、热点资讯等高访问量信息。
• 任务队列；如：秒杀、抢购、购票等。
• 即时信息查询；如：排行榜等。
• 时效性信息控制；如：验证码、投票控制等。
• 分布式数据共享；如：分布式架构中的session等。
• 消息队列
• 分布式锁

基础数据类型之: String

单个string类型的存储空间为512MB

string基本操作

• 添加或修改数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">set key value
</pre>

• 获取数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">get key
</pre>

• 删除数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">del key
</pre>

• 设置过期时间(默认单位为秒)

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">expire key second
</pre>

• 追加信息到初始value后边

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">append key value
</pre>

• 添加/修改多个数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">mset key1 value1 key2 value2...
</pre>

• 获取多个数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">mget key1 key2 ...
</pre>

• 获取字符串长度

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">strlen key
</pre>

• 设置key的生命周期 控制生命周期

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">setex key seconds value (秒)
psetex key millisexxonds value （毫秒）
</pre>

• key的设置约定与数据库中的表-主键-字段一一对应表名主键名主键值字段名eg1orderid443523454nameeg2equireid435432543typeeg3newsid45435454title

基础数据类型之：Hash

• 存储需求： 对一系列存储的数据进行编排，方便管理，典型应用存储对象信息
• 存储结构：一个存储空间存储多个键值对数据
• hash类型：底层使用哈希表结构实现数据存储

image.png

hash存储结构优化

• 如果field数量较少，存储结构优化为类数组结构
• 如果field数量较多，存储结构使用HashMap结构

hash类型基本操作

• 添加/修改数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hset key field value
</pre>

• 获取数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hget key field
hgetall key
</pre>

• 删除数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hdel key field [field2 ...]
</pre>

• 添加或删除多个数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hmset key field1 value1 field2 value2 ...
</pre>

• 获取多个数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hmget key field1 field2 ...
</pre>

• 获取hash表中的字段的数量

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hlen key
</pre>

• 获取hash表中是否存在指定的字段

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hexists key field
</pre>

• 获取哈希表中所用的字段名或字段值

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hkeys key
hvalues key
</pre>

• 设置指定字段的数值数据增加指定范围的值

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hincrby key field increment
hincrbyfloat key field increment
</pre>

• 如果key值下的field存在则不做操作 不存在则添加进去

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">hsetnx key field value
</pre>

hash类型数据操作的注意事项

• hash类型下的value只能存储字符串，不允许存储其他数据类型，不存在嵌套现象，如果数据未获取到，对应的值为（nil）
• 每个hash存储的键值对上限为个键值对
• hash类型十分贴近对象的存储形式，并且可以灵活删除对象属性。但hash设计初衷并不是为了存储大量对象而设计的，切记不可滥用，更不可将hash作为对象列表使用
• hgetall操作可以获取全部属性，如果内部field过多，遍历整体数据效率会很低，有可能会成为数据访问瓶颈

应用场景

• 电商网站购物车设计实现

基础数据类型之：list

• 数据存储需求：存储多个数据，并对数据进入存储Jon关键的顺序进行区分
• 需要的存储结构：一个存储空间存储多个数据，并且数据可以体现进入顺序
• list类型：保存多个数据，底层使用双向链表存储结构实现

image.png

list类型是双向链表存储的

list基本操作

• 添加/修改数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">lpush key value1 value2 [value3] ... //从list链表左侧添加
rpush key value1 value2 [value3] ... //从list右侧添加
</pre>

• 获取数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">lrange key start stop //指定链表起始结束位置中的value
//在获取未知长的的list类型的时候，想查看所有的value可以使用 -1表示倒数第一个 lrange key start -1
lindex key index //获取链表中指定位置的值
llen key //获取链表的长度
</pre>

• 获取并移除数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">lpop key
rpop key
</pre>

• 规定时间内获取并移除数据（阻塞式数据获取）

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">blpop key1 [key2] timeout //指定时间内取出并移除key值对应的value，若timeout超时仍未取出则返回空值（nil） 若本来没有 其他客户端在等待的时候添加了这个key的value则做操作 任务队列
brpop key1 [key2] timeout
</pre>

• 移除指定数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">lrem key count value
</pre>

list类型数据操作注意事项

• list中保存的数据都是string类型的，数据总容量有限最多 2^32-1个元素
• list具有索引概念，但操作数据时通常以队列的形式进行入队出队操作，或以栈的形式进行入栈出栈操作
• 获取全部操作结束数据的索引设置为-1
• list可以对数据进行分页操作，通常第一页的信息来自list，第二页及更多的数据信息通过数据库进行查询加载

基础数据类型之：set

• 存储需求：存储大量的数据，在查询方面提供更高的效率
• 存储结构：能够保存大量的数据，高效的内部存储机制，便于查询
• set类型：与hash存储结构完全相同，仅存储键，不存储值（nil）,并且值不允许为空

image.png

set存储结构是string类型的无序集合，内部存储时hash存储结构，因此添加、查找、删除的复杂度都是O(1)

set基本操作

• 添加不重复的数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">sadd key value
</pre>

• 获取存储的所有数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">smembers key
</pre>

• 删除数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">strem key member1 [member2]
</pre>

• 获取集合数据总量

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">scard key
</pre>

• 判断集合中是否包含指定数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">sismember key member
</pre>

• 随机获取集合中指定数量的数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">srandmember key [count]
</pre>

• 随机获取集合中某个数据并将该数据移出集合

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">apop key
</pre>

• 两个集合的交、并、差集

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">sinter key1 [key2]
sunion key1 [key2]
adiff key1 [key2]
</pre>

• 求两个集合的交、并、差集并存储到指定集合中

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">sinterstore destination key1 [key2]
sunionstore destination key1 [key2]
sdiffstore destination key1 [key2]
</pre>

• 将指定数据从原始集合中移动到目标集合中

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">smove source destination member
</pre>

注意事项

• set类型不允许有重复数据，如果添加的数据在set中已存在，将只保留一份
• set虽然与hash存储结构相同，但无法启用hash中存储值的空间

image.png

基础数据类型：sortedSet

• 存储需求：数据排序有利于数据的展示效果，需要提供一种可以根据自身特征进行排序的方式
• 存储结构：可以保存排序的数据
• 存储类型：在set的存储结构上添加可排序字段

image.png

基本操作

• 添加数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zadd key scorel member [score2 member2]
</pre>

• 获取全部数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zrange key start stop [witchscores]
zrevrange key star stop [witchscores]
</pre>

• 删除数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zrem key member [member ...]
</pre>

• 按条件查询数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zrangebyscore key min max [withscores] [limit]
zrevrangebyscore key max min [withscores]
</pre>

• 条件删除数据

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zremrangebyrank key start stop //start stop 表示索引的开始结束位置
zremrangebyscore key min max //min max表示排序的最小到最大位置
</pre>

• 获取集合数据数量

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zcard key
zcount key min max
</pre>

• 集合交、并操作

<pre style="box-sizing: border-box; font-family: monospace; font-size: 18px; margin: 20px 0px; padding: 15px; border: 0px; background-color: rgb(244, 245, 246); white-space: pre-wrap; word-break: break-all; color: rgb(34, 34, 34); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: justify; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">zinterstore destination numkeys key [key ...]
zunionstore destination key [key ...]</pre>

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