redisデータ型——key String Set

    Redis     “ / ”         NoSQL     ，      ，    ，          。     ，    

    redis   Memcached   , redis           ,  ： key string set hashSet sortedSet list 

    key-value db，              
 key       ，       key          key    ；

del      key
dump    key  
expire       (    )
expireat          
exists key      key 
persist           
pexpire           


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TTL
  key     ，   -2 。
  key               ，   -1 。
  ，     ，   key        。

127.0.0.1:6379> TTL myname 
(integer) -1


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TYPE        
none (key   )
string (   )
list (  )
set (  )
zset (   )
hash (   )

127.0.0.1:6379> type myname
string

APPEDD 
   key             ，value     key        。
   key    ，       key    value 

127.0.0.1:6379> append mygirl aliv
(integer) 4
127.0.0.1:6379> get mygirl
"aliv"
127.0.0.1:6379> 


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DECR key key          


127.0.0.1:6379> set money 50000000000
OK
127.0.0.1:6379> decr money
(integer) 49999999999


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DECRBY key decrement
  key           decrement 
 key    ，   key           0
127.0.0.1:6379>  exists page
(integer) 0
127.0.0.1:6379> decrby page 10
(integer) -10


----------
GET key
  key         
  key            nil 


----------
GETRANGE key start end
 key           ，        
127.0.0.1:6379> get myname
"eaosn_hoo"
127.0.0.1:6379> getrange myname 0 4
"eaosn"

----------
GETSET key value 
  key     ，     nil
127.0.0.1:6379> getset db redis
(nil)
127.0.0.1:6379> get db
"redis"
127.0.0.1:6379> getset db mysql
"redis"


----------
NCR key
key          
 key    ，   key           0
127.0.0.1:6379> incr page
(integer) -9
127.0.0.1:6379> incr page
(integer) -8


----------
INCRBY key increment 
key      
127.0.0.1:6379> incr page
(integer) -8
127.0.0.1:6379> incrby page 20
(integer) 12


----------
MSET key value [key value ...]( ：    )
          key-value  。
   key     ，MSET          

127.0.0.1:6379> mset myname 'eason' myage '24' mygirl 'alige'
OK
127.0.0.1:6379> keys *
1) "myage"
2) "myname"
3) "mygirl"


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MGET key [key ...]( ：     )
    (     )   key   。
    key    ，     key       nil 
127.0.0.1:6379> mget myage myname mygirl
1) "24"
2) "eason"
3) "alige"


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MSETNX key value [key value ...]
        key-value  ，       key    ,  MSETNX           。
127.0.0.1:6379> mget myage myname mygirl
1) "24"
2) "eason"
3) "alige"
127.0.0.1:6379> msetnx myage '25' mybook 'android ios'
(integer) 0


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SET key value [EX seconds] [PX milliseconds] [NX|XX]
 key  value 
ex :       seconds  
px :       milliseconds   

nx :   key         
xx :          

127.0.0.1:6379> set company mc.cn ex 10086 px 50000
OK
127.0.0.1:6379> ttl company
(integer) 42


----------

SETEX key seconds value
  key    
SET key value
EXPIRE key seconds  #       


----------
SETNX key value
  key               
127.0.0.1:6379> exists myname
(integer) 1
127.0.0.1:6379> setnx myname jack
(integer) 0


----------
STRLEN key
   key        ,      0
127.0.0.1:6379> STRLEN nonexisting
(integer) 0

SADD key member [member ...]
  key              ；              key
    ##      ##
127.0.0.1:6379> sadd word job
(integer) 1
    ##      ##
127.0.0.1:6379> sadd word job
(integer) 0
    ##      ##
127.0.0.1:6379> sadd word nagi  hoo
(integer) 2
127.0.0.1:6379> SMEMBERS word
1) "hoo"
2) "nagi"
3) "job"


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SCARD key
   key        
127.0.0.1:6379> SMEMBERS word
1) "hoo"
2) "nagi"
3) "job"
127.0.0.1:6379> scard word
(integer) 3


----------
SDIFF key [key ...]
           
127.0.0.1:6379> sdiff word
1) "job"
2) "girl"
3) "fiends"


----------
SINTER key 
           ，             
127.0.0.1:6379> sinter word
1) "fiends"
2) "girl"
3) "job"


----------
SISMEMBER key value 
    value      key    ，     1     0
127.0.0.1:6379> sinter word
1) "fiends"
2) "girl"
3) "job"


----------
SMEMBERS key
     key       
127.0.0.1:6379> SMEMBERS  word
1) "fiends"
2) "girl"
3) "job"


----------
SMOVE source destination member
  member     source       destination   
127.0.0.1:6379> smove  word like girl
(integer) 1

127.0.0.1:6379> smembers like
1) "bike"
2) "ball"
3) "girl"


----------
SPOP key
               
127.0.0.1:6379> smembers like
1) "bike"
2) "ball"
3) "girl"
127.0.0.1:6379> spop like
"girl"
127.0.0.1:6379> smembers like
1) "bike"
2) "ball"


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SRANDMEMBER key 
                    set  
127.0.0.1:6379> srandmember like
"bike"
127.0.0.1:6379> smembers like
1) "bike"
2) "ball"


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SREM key member [member ...]
     key         member   ，       

127.0.0.1:6379> smembers like
1) "bike"
2) "ball"
127.0.0.1:6379> srem like  bike
(integer) 1
127.0.0.1:6379> srem like  running
(integer) 0


----------
SUNION key
           
127.0.0.1:6379> keys *
1) "like"
2) "word"
127.0.0.1:6379> sunion like word
1) "ball"
2) "job"
3) "fiends"


----------
SUNIONSTORE destination key [key ...]
       destination   ，        destination        
127.0.0.1:6379> sunionstore beijing  like word
(integer) 3
127.0.0.1:6379> smembers beijing
1) "ball"
2) "job"
3) "fiends"