Redis-key operation

SET

 
   
  

  
    
   
set 1 jingya
 
   
  

• Del

 
   
  

  
    
   
del 1
 
   
  

Dump, it's not going to restore. RESTORE key TTL serialized-value

• Exists

 
   
  

  
    
   
exists 1
 
   
  

• EXPIRE

 
   
  

  
    
   
expire 1 10 // 10s后失效
  
    
   
ttl 1 //只需观察1
 
   
  

• Expireat

 
   
  

  
    
   
expireat 2 1455886380 // 使用unix时间戳设置过期时间
 
   
  

• KEYS

  
 

   
  

  
KEYS * 匹配数据库中所有 key 。
   
  

  
KEYS h?llo 匹配 hello ， hallo 和 hxllo 等。 // ? 匹配 1个字符
   
  

  
KEYS h*llo 匹配 hllo 和 heeeeello 等。 // 匹配0个或者多个
   
  

  
KEYS h[ae]llo 匹配 hello 和 hallo ，但不匹配 hillo // 匹配任意一个
  
 

• MIGRATE

 
   
  

  
    
   
MIGRATE host port key destination-db timeout [COPY] [REPLACE]
 
   
  

 
   
  

  
    
   
MIGRATE 127.0.0.1 7777 greeting 0 1000
 
   
  

Timeoutparameter specifies the current instance and the target instance to communicate in milliseconds . Maximum time interval. This means that the operation does not necessarily have to beTimeoutmilliseconds to complete, just that the data transfer time cannot exceed thisTimeoutnumber.

• COPY : Does not remove the key on the source instance.
• Replace: Replaces the key that already exists on the target instance.

• MOVE

 
   
  

  
    
   
move key db
 
   
  

if the current database (source database) and the given database (the target database) have the same name as the givenKey, orKeydoes not exist in the current database, thenMOVEwithout any effect.

• OBJECT

No

• Persist

•    
       
      
  
      
        
       
  PERSIST key
     
       
      

removes the givenKeyTime to Live

Pexpire

 
   
  

  
    
   
Pexpire key milliseconds
 
   
  

Pexpireat

 
   
  

  
    
   
PEXPIREAT key milliseconds-timestamp
 
   
  

Pttl

 
   
  

  
    
   
PTTL key
 
   
  

Randomkey
Randomly returns a key
Rename

 
   
  

  
    
   
Rename key newkey
 
   
  

This is a forced rename Renamenx

 
   
  

  
    
   
RENAMENX key newkey
 
   
  

Sort
This usage is very complicated, it takes a little time

 
   
  
 
    
   
< Span class= "PLN" >sort key [ by pattern      [ limit offset Count      [ get pattern  [ get pattern   ...]    [ asc  |   DESC      [ alpha  Span class= "pun" >   [ store destination     
 
   
  
 

• The sort key Returns the result of the key value from small to large.
• sort key DESC Returns the result of the order of the key values from large to small.

Type

  
 

   
  

  
Type Key
   
  

  
  return to    key      
 
   
  

  
 none       (key does not exist)  
 
   
  

  
 string       (String)  
 
   
  

  
 list       (list)  
 
   
  

  
 set       (collection)  
 
   
  

  
 zset       (ordered set)  
 
   
  

  
Hash   (hash table)

  
 

Scan

 
   
  

  
    
   
SCAN cursor [MATCH pattern] [COUNT count]
 
   
  

From for notes (Wiz)

Redis-key operation