Home Database Mysql Tutorial Redis命令总结

Redis命令总结

Jun 07, 2016 pm 04:37 PM
redis close Order Summarize operate Related connect

连接操作相关的命令 quit:关闭连接(connection) auth:简单密码认证 持久化 save:将数据同步保存到磁盘 bgsave:将数据异步保存到磁盘 lastsave:返回上次成功将数据保存到磁盘的Unix时戳 shundown:将数据同步保存到磁盘,然后关闭服务 远程服务控制 in

连接操作相关的命令

  • quit:关闭连接(connection)
  • auth:简单密码认证

持久化

  • save:将数据同步保存到磁盘
  • bgsave:将数据异步保存到磁盘
  • lastsave:返回上次成功将数据保存到磁盘的Unix时戳
  • shundown:将数据同步保存到磁盘,然后关闭服务

远程服务控制

  • info:提供服务器的信息和统计
  • monitor:实时转储收到的请求
  • slaveof:改变复制策略设置
  • config:在运行时配置Redis服务器

对value操作的命令

  • exists(key):确认一个key是否存在
  • del(key):删除一个key
  • type(key):返回值的类型
  • keys(pattern):返回满足给定pattern的所有key
  • randomkey:随机返回key空间的一个
  • keyrename(oldname,?newname):重命名key
  • dbsize:返回当前数据库中key的数目
  • expire:设定一个key的活动时间(s)
  • ttl:获得一个key的活动时间
  • select(index):按索引查询
  • move(key,?dbindex):移动当前数据库中的key到dbindex数据库
  • flushdb:删除当前选择数据库中的所有key
  • flushall:删除所有数据库中的所有key

对String操作的命令

  • set(key, value):给数据库中名称为key的string赋予值value
  • get(key):返回数据库中名称为key的string的value
  • getset(key, value):给名称为key的string赋予上一次的value
  • mget(key1, key2,…, key N):返回库中多个string的value
  • setnx(key, value):添加string,名称为key,值为value
  • setex(key,?time,?value):向库中添加string,设定过期时间time
  • mset(key N, value N):批量设置多个string的值
  • msetnx(key N, value N):如果所有名称为key?i的string都不存在
  • incr(key):名称为key的string增1操作
  • incrby(key, integer):名称为key的string增加integer
  • decr(key):名称为key的string减1操作
  • decrby(key, integer):名称为key的string减少integer
  • append(key, value):名称为key的string的值附加value
  • substr(key, start, end):返回名称为key的string的value的子串

对List操作的命令

  • rpush(key, value):在名称为key的list尾添加一个值为value的元素
  • lpush(key, value):在名称为key的list头添加一个值为value的?元素
  • llen(key):返回名称为key的list的长度
  • lrange(key, start, end):返回名称为key的list中start至end之间的元素
  • ltrim(key, start, end):截取名称为key的list
  • lindex(key, index):返回名称为key的list中index位置的元素
  • lset(key, index, value):给名称为key的list中index位置的元素赋值
  • lrem(key, count, value):删除count个key的list中值为value的元素
  • lpop(key):返回并删除名称为key的list中的首元素
  • rpop(key):返回并删除名称为key的list中的尾元素
  • blpop(key1, key2,… key N, timeout):lpop命令的block版本。
  • brpop(key1, key2,… key N, timeout):rpop的block版本。
  • rpoplpush(srckey, dstkey):返回并删除名称为srckey的list的尾元素,并将该元素添加到名称为dstkey的list的头部

对Set操作的命令

  • sadd(key, member):向名称为key的set中添加元素member
  • srem(key, member)?:删除名称为key的set中的元素member
  • spop(key)?:随机返回并删除名称为key的set中一个元素
  • smove(srckey, dstkey, member)?:移到集合元素
  • scard(key)?:返回名称为key的set的基数
  • sismember(key, member)?:member是否是名称为key的set的元素
  • sinter(key1, key2,…key N)?:求交集
  • sinterstore(dstkey, (keys))?:求交集并将交集保存到dstkey的集合
  • sunion(key1, (keys))?:求并集
  • sunionstore(dstkey, (keys))?:求并集并将并集保存到dstkey的集合
  • sdiff(key1, (keys))?:求差集
  • sdiffstore(dstkey, (keys))?:求差集并将差集保存到dstkey的集合
  • smembers(key)?:返回名称为key的set的所有元素
  • srandmember(key)?:随机返回名称为key的set的一个元素

对Hash操作的命令

  • hset(key, field, value):向名称为key的hash中添加元素field
  • hget(key, field):返回名称为key的hash中field对应的value
  • hmget(key, (fields)):返回名称为key的hash中field?i对应的value
  • hmset(key, (fields)):向名称为key的hash中添加元素field
  • hincrby(key, field, integer):将名称为key的hash中field的value增加integer
  • hexists(key, field):名称为key的hash中是否存在键为field的域
  • hdel(key, field):删除名称为key的hash中键为field的域
  • hlen(key):返回名称为key的hash中元素个数
  • hkeys(key):返回名称为key的hash中所有键
  • hvals(key):返回名称为key的hash中所有键对应的value
  • hgetall(key):返回名称为key的hash中所有的键(field)及其对应的value
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to build the redis cluster mode How to build the redis cluster mode Apr 10, 2025 pm 10:15 PM

Redis cluster mode deploys Redis instances to multiple servers through sharding, improving scalability and availability. The construction steps are as follows: Create odd Redis instances with different ports; Create 3 sentinel instances, monitor Redis instances and failover; configure sentinel configuration files, add monitoring Redis instance information and failover settings; configure Redis instance configuration files, enable cluster mode and specify the cluster information file path; create nodes.conf file, containing information of each Redis instance; start the cluster, execute the create command to create a cluster and specify the number of replicas; log in to the cluster to execute the CLUSTER INFO command to verify the cluster status; make

How to use the redis command How to use the redis command Apr 10, 2025 pm 08:45 PM

Using the Redis directive requires the following steps: Open the Redis client. Enter the command (verb key value). Provides the required parameters (varies from instruction to instruction). Press Enter to execute the command. Redis returns a response indicating the result of the operation (usually OK or -ERR).

How to clear redis data How to clear redis data Apr 10, 2025 pm 10:06 PM

How to clear Redis data: Use the FLUSHALL command to clear all key values. Use the FLUSHDB command to clear the key value of the currently selected database. Use SELECT to switch databases, and then use FLUSHDB to clear multiple databases. Use the DEL command to delete a specific key. Use the redis-cli tool to clear the data.

How to use single threaded redis How to use single threaded redis Apr 10, 2025 pm 07:12 PM

Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.

How to read the source code of redis How to read the source code of redis Apr 10, 2025 pm 08:27 PM

The best way to understand Redis source code is to go step by step: get familiar with the basics of Redis. Select a specific module or function as the starting point. Start with the entry point of the module or function and view the code line by line. View the code through the function call chain. Be familiar with the underlying data structures used by Redis. Identify the algorithm used by Redis.

How to implement the underlying redis How to implement the underlying redis Apr 10, 2025 pm 07:21 PM

Redis uses hash tables to store data and supports data structures such as strings, lists, hash tables, collections and ordered collections. Redis persists data through snapshots (RDB) and append write-only (AOF) mechanisms. Redis uses master-slave replication to improve data availability. Redis uses a single-threaded event loop to handle connections and commands to ensure data atomicity and consistency. Redis sets the expiration time for the key and uses the lazy delete mechanism to delete the expiration key.

How to read redis queue How to read redis queue Apr 10, 2025 pm 10:12 PM

To read a queue from Redis, you need to get the queue name, read the elements using the LPOP command, and process the empty queue. The specific steps are as follows: Get the queue name: name it with the prefix of "queue:" such as "queue:my-queue". Use the LPOP command: Eject the element from the head of the queue and return its value, such as LPOP queue:my-queue. Processing empty queues: If the queue is empty, LPOP returns nil, and you can check whether the queue exists before reading the element.

How to view all keys in redis How to view all keys in redis Apr 10, 2025 pm 07:15 PM

To view all keys in Redis, there are three ways: use the KEYS command to return all keys that match the specified pattern; use the SCAN command to iterate over the keys and return a set of keys; use the INFO command to get the total number of keys.

See all articles