Redis知识总结
Redis
常用命令LINUX
set key value 添加 get key 获取 select 5 切换数据库 flushdb 清除当前数据库 FLUSHALL 清除全部数据库的内容 keys * 获取所有的 EXPIRE key time 设置key的过期时间，单位为秒 ttl key 查看当前key的剩余时间 EXISTS key 查看该key是否存在 move key 移除当前key type key 查看key的类型 12 clear 清楚屏幕数据 help @String 查看String相关命令 incr xxxx 增加 带NX的命令 有就不赋值，没有则赋值
Redis五大数据类型
String(字符串) List（列表） Set（集合） Hash（哈希） zset（有序集合）
结构类型 | 结构存储的值 | 结构的读写能力 |
|---|---|---|
String | 可以是字符串、整数或者浮点数 | 对整个字符串或者字符串的其中一部分执行操作；对象和浮点数执行自增(increment)或者自减(decrement) |
List | 一个链表，链表上的每个节点都包含了一个字符串 | 从链表的两端推入或者弹出元素；根据偏移量对链表进行修剪(trim)；读取单个或者多个元素；根据值来查找或者移除元素 |
Set | 包含字符串的无序收集器(unorderedcollection)，并且被包含的每个字符串都是独一无二的、各不相同 | 添加、获取、移除单个元素；检查一个元素是否存在于某个集合中；计算交集、并集、差集；从集合里卖弄随机获取元素 |
Hash | 包含键值对的无序散列表 | 添加、获取、移除单个键值对；获取所有键值对 |
Zset | 字符串成员(member)与浮点数分值(score)之间的有序映射，元素的排列顺序由分值的大小决定 | 添加、获取、删除单个元素；根据分值范围(range)或者成员来获取元素 |
String
APPEND key value
summary: Append a value to a key
since: 2.0.0
BITCOUNT key [start end]
summary: Count set bits in a string
since: 2.6.0
BITFIELD key [GET type offset] [SET type offset value] [INCRBY type offset increment] [OVERFLOW WRAP|SAT|FAIL]
summary: Perform arbitrary bitfield integer operations on strings
since: 3.2.0
BITOP operation destkey key [key ...]
summary: Perform bitwise operations between strings
since: 2.6.0
BITPOS key bit [start] [end]
summary: Find first bit set or clear in a string
since: 2.8.7
DECR key
summary: Decrement the integer value of a key by one
since: 1.0.0
DECRBY key decrement
summary: Decrement the integer value of a key by the given number
since: 1.0.0
GET key
summary: Get the value of a key
since: 1.0.0
GETBIT key offset
summary: Returns the bit value at offset in the string value stored at key
since: 2.2.0
GETRANGE key start end
summary: Get a substring of the string stored at a key
since: 2.4.0
GETSET key value
summary: Set the string value of a key and return its old value
since: 1.0.0
INCR key
summary: Increment the integer value of a key by one
since: 1.0.0
INCRBY key increment
summary: Increment the integer value of a key by the given amount
since: 1.0.0
INCRBYFLOAT key increment
summary: Increment the float value of a key by the given amount
since: 2.6.0
MGET key [key ...]
summary: Get the values of all the given keys
since: 1.0.0
MSET key value [key value ...]
summary: Set multiple keys to multiple values
since: 1.0.1
MSETNX key value [key value ...]
summary: Set multiple keys to multiple values, only if none of the keys exist
since: 1.0.1
PSETEX key milliseconds value
summary: Set the value and expiration in milliseconds of a key
since: 2.6.0
SET key value [EX seconds] [PX milliseconds] [NX|XX]
summary: Set the string value of a key
since: 1.0.0
SETBIT key offset value
summary: Sets or clears the bit at offset in the string value stored at key
since: 2.2.0
SETEX key seconds value // 设置值同时设置时间
summary: Set the value and expiration of a key
since: 2.0.0
SETNX key value
summary: Set the value of a key, only if the key does not exist
since: 1.0.0
SETRANGE key offset value // 从第几个偏移量开始覆盖
summary: Overwrite part of a string at key starting at the specified offset
since: 2.2.0
STRLEN key
summary: Get the length of the value stored in a key
since: 2.2.0List
BLPOP key [key ...] timeout
summary: Remove and get the first element in a list, or block until one is available
since: 2.0.0
BRPOP key [key ...] timeout
summary: Remove and get the last element in a list, or block until one is available
since: 2.0.0
BRPOPLPUSH source destination timeout
summary: Pop a value from a list, push it to another list and return it; or block until one is available
since: 2.2.0
LINDEX key index
summary: Get an element from a list by its index
since: 1.0.0
LINSERT key BEFORE|AFTER pivot value
summary: Insert an element before or after another element in a list
since: 2.2.0
LLEN key
summary: Get the length of a list
since: 1.0.0
LPOP key
summary: Remove and get the first element in a list
since: 1.0.0
LPUSH key value [value ...]
summary: Prepend one or multiple values to a list
since: 1.0.0
LPUSHX key value
summary: Prepend a value to a list, only if the list exists
since: 2.2.0
LRANGE key start stop
summary: Get a range of elements from a list
since: 1.0.0
LREM key count value
summary: Remove elements from a list
since: 1.0.0
LSET key index value
summary: Set the value of an element in a list by its index
since: 1.0.0
LTRIM key start stop
summary: Trim a list to the specified range
since: 1.0.0
RPOP key
summary: Remove and get the last element in a list
since: 1.0.0
RPOPLPUSH source destination
summary: Remove the last element in a list, prepend it to another list and return it
since: 1.2.0
RPUSH key value [value ...]
summary: Append one or multiple values to a list
since: 1.0.0
RPUSHX key value
summary: Append a value to a list, only if the list exists
since: 2.2.0先进先出 队列 左进左出 栈
消息队列 最新列表 均可实现
Set
SADD key member [member ...]
summary: Add one or more members to a set
since: 1.0.0
SCARD key
summary: Get the number of members in a set
since: 1.0.0
SDIFF key [key ...]
summary: Subtract multiple sets
since: 1.0.0
SDIFFSTORE destination key [key ...]
summary: Subtract multiple sets and store the resulting set in a key
since: 1.0.0
SINTER key [key ...]
summary: Intersect multiple sets
since: 1.0.0
SINTERSTORE destination key [key ...]
summary: Intersect multiple sets and store the resulting set in a key
since: 1.0.0
SISMEMBER key member
summary: Determine if a given value is a member of a set
since: 1.0.0
SMEMBERS key
summary: Get all the members in a set
since: 1.0.0
SMOVE source destination member
summary: Move a member from one set to another
since: 1.0.0
SPOP key [count]
summary: Remove and return one or multiple random members from a set
since: 1.0.0
SRANDMEMBER key [count]
summary: Get one or multiple random members from a set
since: 1.0.0
SREM key member [member ...]
summary: Remove one or more members from a set
since: 1.0.0
SSCAN key cursor [MATCH pattern] [COUNT count]
summary: Incrementally iterate Set elements
since: 2.8.0
SUNION key [key ...]
summary: Add multiple sets
since: 1.0.0
SUNIONSTORE destination key [key ...]
summary: Add multiple sets and store the resulting set in a key
since: 1.0.0Hash
HDEL key field [field ...]
summary: Delete one or more hash fields
since: 2.0.0
HEXISTS key field
summary: Determine if a hash field exists
since: 2.0.0
HGET key field
summary: Get the value of a hash field
since: 2.0.0
HGETALL key
summary: Get all the fields and values in a hash
since: 2.0.0
HINCRBY key field increment
summary: Increment the integer value of a hash field by the given number
since: 2.0.0
HINCRBYFLOAT key field increment
summary: Increment the float value of a hash field by the given amount
since: 2.6.0
HKEYS key
summary: Get all the fields in a hash
since: 2.0.0
HLEN key
summary: Get the number of fields in a hash
since: 2.0.0
HMGET key field [field ...]
summary: Get the values of all the given hash fields
since: 2.0.0
HMSET key field value [field value ...]
summary: Set multiple hash fields to multiple values
since: 2.0.0
HSCAN key cursor [MATCH pattern] [COUNT count]
summary: Incrementally iterate hash fields and associated values
since: 2.8.0
HSET key field value
summary: Set the string value of a hash field
since: 2.0.0
HSETNX key field value
summary: Set the value of a hash field, only if the field does not exist
since: 2.0.0
HSTRLEN key field
summary: Get the length of the value of a hash field
since: 3.2.0
HVALS key
summary: Get all the values in a hash
since: 2.0.0zset
ZADD key [NX|XX] [CH] [INCR] score member [score member ...]
summary: Add one or more members to a sorted set, or update its score if it already exists
since: 1.2.0
ZCARD key
summary: Get the number of members in a sorted set
since: 1.2.0
ZCOUNT key min max
summary: Count the members in a sorted set with scores within the given values
since: 2.0.0
ZINCRBY key increment member
summary: Increment the score of a member in a sorted set
since: 1.2.0
ZINTERSTORE destination numkeys key [key ...] [WEIGHTS weight] [AGGREGATE SUM|MIN|MAX]
summary: Intersect multiple sorted sets and store the resulting sorted set in a new key
since: 2.0.0
ZLEXCOUNT key min max
summary: Count the number of members in a sorted set between a given lexicographical range
since: 2.8.9
ZRANGE key start stop [WITHSCORES]
summary: Return a range of members in a sorted set, by index
since: 1.2.0
ZRANGEBYLEX key min max [LIMIT offset count]
summary: Return a range of members in a sorted set, by lexicographical range
since: 2.8.9
ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]
summary: Return a range of members in a sorted set, by score
since: 1.0.5
ZRANK key member
summary: Determine the index of a member in a sorted set
since: 2.0.0
ZREM key member [member ...]
summary: Remove one or more members from a sorted set
since: 1.2.0
ZREMRANGEBYLEX key min max
summary: Remove all members in a sorted set between the given lexicographical range
since: 2.8.9
ZREMRANGEBYRANK key start stop
summary: Remove all members in a sorted set within the given indexes
since: 2.0.0
ZREMRANGEBYSCORE key min max
summary: Remove all members in a sorted set within the given scores
since: 1.2.0
ZREVRANGE key start stop [WITHSCORES]
summary: Return a range of members in a sorted set, by index, with scores ordered from high to low
since: 1.2.0
ZREVRANGEBYLEX key max min [LIMIT offset count]
summary: Return a range of members in a sorted set, by lexicographical range, ordered from higher to lower strings.
since: 2.8.9
ZREVRANGEBYSCORE key max min [WITHSCORES] [LIMIT offset count]
summary: Return a range of members in a sorted set, by score, with scores ordered from high to low
since: 2.2.0
ZREVRANK key member
summary: Determine the index of a member in a sorted set, with scores ordered from high to low
since: 2.0.0
ZSCAN key cursor [MATCH pattern] [COUNT count]
summary: Incrementally iterate sorted sets elements and associated scores
since: 2.8.0
ZSCORE key member
summary: Get the score associated with the given member in a sorted set
since: 1.2.0
ZUNIONSTORE destination numkeys key [key ...] [WEIGHTS weight] [AGGREGATE SUM|MIN|MAX]
summary: Add multiple sorted sets and store the resulting sorted set in a new key
since: 2.0.0本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
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