Redis is an open source, in-memory data structure store used as a database, cache, message broker, and streaming engine.
存储模式 字符串（String）Redis strings store sequences of bytes, including text, serialized objects, and binary arrays. As such, strings are the simplest type of value you can associate with a Redis key.
redis以二进制保存数据
列表（list）Redis lists are linked lists of string values. Redis lists are frequently used to:
(1)Implement stacks and queues.
(2)Build queue management for background worker systems.
按照列表插入顺序排序
注意：1. 允许重复出现值
集合(Set)A Redis set is an unordered collection of unique strings (members).
You can use Redis sets to efficiently: (1)Track unique items (e.g., track all unique IP addresses accessing a given blog post). (2)Represent relations (e.g., the set of all users with a given role). (3)Perform common set operations such as intersection, unions, and differences.
Set：无序唯一的字符串或数字，操作：交、并、差
注意：1. 字符串值不能重复，不排序
有序集合(Softed Set) 散列表（hash）Redis hashes are record types structured as collections of field-value pairs. You can use hashes to represent basic objects and to store groupings of counters, among other things.
bitmaps hyperloglogs geospatial indexes stream 命令 字符串命令 检查是否装好 redis-server redis.windows.conf 运行 redis-cli -h 127.0.0.1 -p 6379 保存（修改）键值对 set test "test value"如果存在不修改，如果不存在，添加
setnx key value msetnx key value [key value...] 删除键值对 del key [key...] 获得键值对 get test mget value [value...] 判断是否存在键值对 exists test 自增 incr test自增大于1
INCRBY key num 获取服务器信息 info [属性] 改变数据库 select index 存在多少键值对 dbsize 模糊查询（显示键名） keys [键名] 看值的类型 type [键名] 查看值的长度 strlen key 清空数据库 flushdb 清空所有数据库 flushall 清屏 clear List（列表）命令 插入左插入
lpush key value [value...]右插入
rpush key value [value...] 查询 lrange key start stoplrange newList 0 -1//查询全部 删除删除左边第一个元素
lpop key删除右边第一个元素
rpop key Set（集合）命令 SADD添加数据（增） sadd key member [member……] SREM删除数据（删） srem key member [member...] SMEMBERS 获得元素（查） smembers key SISMEMBER 判断是否是成员 SINTER 取交集 SCAED 获取集合的长度 scard key srandmember随机返回元素 srandmember key [count]count：随机返回的元素个数
Hash命令 hset插入 hset hashtable：key1 key2 value hget获得值 hget hashtable:key1 key2 hmset多个插入 hmget多个获得值 hgetall获取全部 hexists是否存在值 hexists key1 key2 hdel删除 hdel key1 key2 [key1 key2] 位图命令 bitcount命令 bitcount key [start end]
