Redis常见的命令和通用命令

最新推荐文章于 2025-03-22 17:09:57 发布

陈福国

最新推荐文章于 2025-03-22 17:09:57 发布

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分类专栏：数据库

本文链接：https://blog.youkuaiyun.com/qq_45112637/article/details/98030491

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8 篇文章

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本文深入探讨了Redis中五种主要数据类型：字符串(String)、哈希(Hash)、列表(List)、集合(Set)及有序集合(Sorted Set)的特点与应用场景，并详细列举了每种类型的关键操作命令，如存取、删除、遍历等，为读者提供了全面的Redis使用指南。

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1 Redis的数据类型

String

hash 哈希类型

list 列表类型

set 集合类型

sorttset 有序集合类型

2 Redis 常用命令和通用命令

2.1 String 常用命令 set get del

127.0.0.1:6379> set company "java9502"
OK
127.0.0.1:6379> get company
"java9502"
127.0.0.1:6379> set company1 "java22"
OK
127.0.0.1:6379> del company
(integer) 1
127.0.0.1:6379> get company
(nil)
127.0.0.1:6379>

 2.2 哈希类型 hash

存值：hset key filed value

取值 hget key field

删除： hdel key field

获得所有： hgetall key

127.0.0.1:6379> hset myhash username ruirui
(integer) 1
127.0.0.1:6379> hset myhash password "123"
(integer) 1
127.0.0.1:6379> hset myhash email "12358@.com
Invalid argument(s)
127.0.0.1:6379> hset myhash email "1235@.com"
(integer) 1
127.0.0.1:6379> hget myhash username
"ruirui"
127.0.0.1:6379> hget myhash password
"123"
127.0.0.1:6379> hgetall key
(empty list or set)
127.0.0.1:6379> hgetall myhash
1) "username1"
2) "junjun"
3) "username"
4) "ruirui"
5) "password"
6) "123"
7) "email"
8) "1235@.com"
127.0.0.1:6379>

 2.3 list 列表类型

存数据 lpush key values

从尾部取数据：lpop key

从头部取数据： rpop key

lrange key 0 -1 遍历该键所有的数据


127.0.0.1:6379> rpop my
"a"
127.0.0.1:6379> rpop my
"b"
127.0.0.1:6379> LRANGE my 0 100
1) "e"
2) "d"
3) "c"
127.0.0.1:6379> lpush ruirui a b a b a b
(integer) 6

127.0.0.1:6379> LRANGE ruirui 0 100
1) "b"
2) "a"
3) "b"
4) "a"
5) "b"
6) "a"
127.0.0.1:6379> lpush r a b c d
(integer) 4
127.0.0.1:6379> LRANGE r 0 -1
1) "d"
2) "c"
3) "b"
4) "a"
127.0.0.1:6379>

 2.4 set

存数据 sadd key values

取数据 smembers key

删除指定数据： srem key 具体的值

127.0.0.1:6379> sadd bobo a b c
(integer) 3
127.0.0.1:6379> SMEMBERS bobo
1) "c"
2) "b"
3) "a"
127.0.0.1:6379> sadd gg a b c d r t f
(integer) 7
127.0.0.1:6379> SMEMBERS gg
1) "d"
2) "f"
3) "t"
4) "b"
5) "c"
6) "a"
7) "r"
127.0.0.1:6379> sadd ggg a b c
(integer) 3
127.0.0.1:6379> srem a
(error) ERR wrong number of arguments for 'srem' command
127.0.0.1:6379> SREM ggg
(error) ERR wrong number of arguments for 'srem' command
127.0.0.1:6379> srem ggg a
(integer) 1
127.0.0.1:6379> SMEMBERS ggg
1) "c"
2) "b"
127.0.0.1:6379>

 2.5 有序集合类型 sortset

存数据：zadd key values[value value1]

删除数据： zrem key value1

遍历数据： zrange key 0 -1

127.0.0.1:6379> zadd myruirui 5 lijun 3 bobo 11 doudou 8 yangyang 7 lianglaing
(integer) 5
127.0.0.1:6379> ZRANGE myruirui 0 -1

“bobo”
“lijun”
“lianglaing”
“yangyang”
“doudou”
127.0.0.1:6379> zrem myruirui lijun
(integer) 1
127.0.0.1:6379> ZRANGE myruirui 0 -1
“bobo”
“lianglaing”
“yangyang”
“doudou”
127.0.0.1:6379>

 2.6 通用命令

· keys * 查询所有的键

del key 删除指定的键

type key 判断key类型

exists key 判断改键是否存在

127.0.0.1:6379> keys *
 1) "ruirui"
 2) "company1"
 3) "name"
 4) "java9501"
 5) "ggg"
 6) "bobo"
 7) "r"
 8) "my"
 9) "myhash"
10) "myruirui"
11) "username1"
12) "mylist"
13) "zadd"
14) "myset"
15) "gg"
127.0.0.1:6379> del r
(integer) 1
127.0.0.1:6379> keys *
 1) "ruirui"
 2) "company1"
 3) "name"
 4) "java9501"
 5) "ggg"
 6) "bobo"
 7) "my"
 8) "myhash"
 9) "myruirui"
10) "username1"
11) "mylist"
12) "zadd"
13) "myset"
14) "gg"
127.0.0.1:6379> EXISTS lijun
(integer) 0
127.0.0.1:6379> EXISTS gg
(integer) 1
127.0.0.1:6379> type gg
set
127.0.0.1:6379> type company
none
127.0.0.1:6379> type company1
string
127.0.0.1:6379>