redis命令集

$ ./redis-cli -h 192.168.228.174  表示连接 192.168.228.174的redis服务器

查看redis信息： info
ping服务器： ping
退出客户端： quit

事务:
MULTI ： 开启事物
* some redis command *
EXEC. ： 执行事物

DISCARD ：取消事物
WATCH : 监视key ，如果在事务执行之前 key 被其他命令所改动，那么事务将被打断

判断Key 是否存在 ： exists key
查看所有的keys ： keys * // *通配符 s*表示s开头的key，区分大小写
判断Key的类型 ： type key

清空所有数据库：flushall
清空当前数据库：flushdb  //

设置主从库： slaveof 192.168.228.174 6379  // 本地数据库会同步到主库
取消跟从: slaveof no noe

server:

client kill ip:port -> Kill the connection of a client
client list   -> Get the list of client connections
client getname -> Get the current connection name
client set name connection-name -> Set the current connection name

time          -> Return the current server time
save          -> Synchronously save the dataset to disk
bgsave -> Asynchronously save the dataset to disk
lastsave -> Get the UNIX time stamp of the last successful save to disk
dbsize -> Return the number of keys in the selected database

sync -> Internal command used for replication
shutdown -> Synchronously save the dataset to disk and then shut down the server

?? monitor -> Listen for all requests received by the server in real time

config get parameter -> Get the value of a configuration parameter
config set paramater value -> Set a configuration parameter to the given value
config resetstat -> Reset the stats returned by INFO
config rewrite -> Rewrite the configuration file with the in memory configuration

debug object key -> Get debugging information about a key
debug segfault -> Make the server crash

Connection:
echo message -> Echo the given string
auth password -> Authenticate to the server

what is channel  ? how publish & subscribe ?
 
字符串命令：
get key ->  get foo
set key value -> set foo bar
append key value -> append foo bar2  如果 foo之前是bar 执行后foo成为 barbar2
strlen key -> 获取value长度

decr key -> 要求value是整数
decrby key decrement
incr key
incrby key increment

incrbyfloat key increment -> Increment the float value of a key

getset key value -> 返回旧值

mget key [key ...] ->  多个get/set
mset key value [key value ...]

getrange key start end -> getter/setter部分子串
setrange key offset value 

如果key不存在，才设置value，即不会把覆盖原有的key值
setnx key value -> Set the value of a key, only if the key does not exist
msetnx key value [key value ...] 

设置会过期的key
setex key seconds value -> Set the value and expiration of a key
psetex key milliseconds value -> Set the value and expiration in milliseconds of a key

比特位相关的命令：
setbit key offset value -> Sets or clears the bit at offset in the string value stored at key
getbit key offset -> Returns the bit value at offset in the string value stored at key
bitcount key [start] [end] -> Count set bits in a string
bitpos key bit [start] [end] -> Find first bit set or clear in a string

bitop and destkey key [key ...] 对一个或多个 key 求逻辑并，并将结果保存到 destkey
bitop or destkey key [key ...] 对一个或多个 key 求逻辑或，并将结果保存到 destkey
bitop xor destkey key [key ...] 对一个或多个 key 求逻辑异或，并将结果保存到 destkey
bitop not destkey key 对给定 key 求逻辑非，并将结果保存到 destkey


Hashes命令：
查看hash的所有字段： hkeys key
查看hash的所有value：hvals key
获取所有字段和值： hgetall key
查看hash有多少个字段：hlen key

判断hash的字段是否存在： hexists key field
获取hash对应字段的值：hget key field
设置hash对应字段的值：hset key field value
                      hmget key field [field ...]
                      hmset key field value [field value ...] 

当不存在才设置字段的值，即不覆盖已有的值：hsetnx key field value
删除hash的字段：hdel key field [field ...]

hincrby key field increment -> Increment the integer value of a hash field
hincrbyfloat key field increment -> Increment the float value of a hash field

Lists: 列表
lpush key value [value ..] -> Prepend one or multiple values to a list
rpush key value [value ..] -> Append one or multiple values to a list
lpop key -> Remove and get the first element in a list
rpop key -> Remove and get the last element in a list
lindex key index -> Get an element from a list by its index
linsert key before|after pivot value -> Insert an element before or after another element in a list
lset key index value -> Set the value of an element in a list by its index
lrange key start stop -> Get a range of elements from a list
llen key -> Get the length of a list
lpushx key value -> Prepend a value to a list, only if the list exists
rpushx key value -> Append a value to a list, only if the list exists
rpoplpush source dest -> Remove the last element in a list, append it to another list and return it

blpop key [key ...] timeout -> Remove and get the first element in a list, or block until one is available
brpop key [key ...] timeout -> Remove and get the last element in a list, or block until one is available
brpoplpush source dest timeout -> Pop a value from a list, push it to another list and return it; or block until one is available

Sets:   集合
sadd key member [member ..]  -> Add one or more members to a set
scard key -> Get the number of members in a set
smembers key -> Get all the members in a set
sismember key member -> Determine if a given value is a member of a set
spop key -> Remove and return a random member from a set
srem key member [member..] -> Remove one or more members from a set
srandmember key [count] -> Get one or multiple random members from a set

sdiff key [key ...] -> Subtract multiple sets
sinter key [key ...] ->Intersect multiple sets
sunion key [key ...] -> Add multiple sets

Sorted Sets:  有序集合
zadd key score member [score member ...] -> Add one or more members to a sorted set, or update its score if it already exists
zcard key -> Get the number of members in a sorted set 
zscore key member -> Get the score associated with the given member in a sorted set