redis|stringコマンド

string

# SET key value      
127.0.0.1:6379> SET name kity
OK

# SETNX key value      ，           

# GET key      
127.0.0.1:6379> GET name
"kity"

# GETSET key value      key value，        
127.0.0.1:6379> GETSET age 12
"10"
127.0.0.1:6379> GET age
"12"

# SETEX key seconds value    key-value       （  ： ）
127.0.0.1:6379> SETEX age 20 18
OK
127.0.0.1:6379> GET age
"18"
127.0.0.1:6379> GET a
(nil)

# MSET key value [key value ...]        
127.0.0.1:6379> KEYS *
1) "name"
127.0.0.1:6379> MSET age 18 gender 1 
OK
127.0.0.1:6379> KEYS *
1) "age"
2) "name"
3) "gender"

# SETRANGE key offset value      offset   ，  key   string    
127.0.0.1:6379> SET name 'hello kitty'
OK
127.0.0.1:6379> SETRANGE name 6 world
(integer) 11
127.0.0.1:6379> GET name
"hello world"
#   offset   key  string   ，   string    0   offset。
127.0.0.1:6379> SETRANGE name 12 two
(integer) 15
127.0.0.1:6379> get name
"hello kitty\x00two"

# STRLEN key      
127.0.0.1:6379> STRLEN name
(integer) 7

# GETRANGE key start end    key        
127.0.0.1:6379> GETRANGE name 6 -1
"kitty one"

# MGET key [key ...]            
127.0.0.1:6379> MGET age name gender
1) "18"
2) "kity"
3) "1"

# INCR key   key   value 1
127.0.0.1:6379> GET age
"18"
127.0.0.1:6379> INCR age
(integer) 19
127.0.0.1:6379> INCR age
(integer) 20

#       
127.0.0.1:6379> GET name
"kity"
127.0.0.1:6379> INCR name
(error) ERR value is not an integer or out of range

# INCRBY key increment   key      increment
127.0.0.1:6379> GET age
"20"
127.0.0.1:6379> INCRBY age 10
(integer) 30

# INCBYFLOAT key increment         
127.0.0.1:6379> SET num 1
OK
127.0.0.1:6379> INCRBYFLOAT num 2.1
"3.1"

# DECR key   key   value 1
127.0.0.1:6379> GET gender
"1"
127.0.0.1:6379> DECR gender 
(integer) 0
127.0.0.1:6379> DECR gender 
(integer) -1

# DECRBY key increment   key      increment
127.0.0.1:6379> DECRBY age 10
(integer) 20

# APPEND key value    
127.0.0.1:6379> APPEND name  ' one'
(integer) 7
127.0.0.1:6379> GET name
"kity one"