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Redis Related dictionaries

del Translation example syntax

dump Translation example syntax

exists Translation example syntax

expire Translation example syntax

expireat Translation example syntax

keys Translation example syntax

migrate Translation example syntax

move Translation example syntax

object Translation example syntax

presist Translation example syntax

pexpire Translation example syntax

pexpireat Translation example syntax

pttl Translation example syntax

randomkey Translation example syntax

rename Translation example syntax

renamenx Translation example syntax

restore Translation example syntax

sort Translation example syntax

ttl Translation example syntax

type Translation example syntax

scan Translation example syntax

bitcount Translation example syntax

bitop Translation example syntax

append Translation example syntax

decr Translation example syntax

decrby Translation example syntax

get Translation example syntax

getbit Translation example syntax

getrange Translation example syntax

getset Translation example syntax

incr Translation example syntax

incrby Translation example syntax

incrbyfloat Translation example syntax

mget Translation example syntax

mset Translation example syntax

msetnx Translation example syntax

psetex Translation example syntax

set Translation example syntax

setbit Translation example syntax

setex Translation example syntax

setnx Translation example syntax

setrange Translation example syntax

strlen Translation example syntax

hdel Translation example syntax

hexists Translation example syntax

hget Translation example syntax

hgetall Translation example syntax

hincrby Translation example syntax

hincrbyfloat Translation example syntax

hkeys Translation example syntax

hlen Translation example syntax

hmget Translation example syntax

hmset Translation example syntax

hset Translation example syntax

hsetnx Translation example syntax

hvals Translation example syntax

blpop Translation example syntax

brpop Translation example syntax

brpoplpush Translation example syntax

lindex Translation example syntax

linsert Translation example syntax

llen Translation example syntax

lpop Translation example syntax

lpush Translation example syntax

lpushx Translation example syntax

lrange Translation example syntax

lrem Translation example syntax

lset Translation example syntax

ltrim Translation example syntax

rpop Translation example syntax

rpoplpush Translation example syntax

rpush Translation example syntax

rpushx Translation example syntax

sadd Translation example syntax

scard Translation example syntax

sdiff Translation example syntax

sdiffstore Translation example syntax

sinter Translation example syntax

sinterstore Translation example syntax

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smembers Translation example syntax

smove Translation example syntax

spop Translation example syntax

srandmember Translation example syntax

srem Translation example syntax

sunion Translation example syntax

sunionstore Translation example syntax

zadd Translation example syntax

zcard Translation example syntax

zcount Translation example syntax

zincrby Translation example syntax

zrange Translation example syntax

zrangebyscore Translation example syntax

zrank Translation example syntax

zrem Translation example syntax

zremrangebyrank Translation example syntax

zremrangebyscore Translation example syntax

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redis APPEND command

Chinese translationRecent Updates：2018-05-16 09:44:58

UK[əˈpend] US[əˈpɛnd]

vt.Attach; add; paste; sign (name)

Third person singular: appends Present participle: appending Past tense: appended past Participle: appended

redis APPEND command Video explanation

redis APPEND command syntax

Function: If key already exists and is a string, the APPEND command will append value to the end of the original value of key. If key does not exist, APPEND simply sets the given key to value, just like executing SET key value .

Syntax: APPEND key value

Available versions:>= 2.0.0

Time complexity : Amortized O(1)

Return: The length of the string in key after appending value.

redis APPEND command example

# 对不存在的 key 执行 APPEND
redis> EXISTS myphone               # 确保 myphone 不存在
(integer) 0
redis> APPEND myphone "nokia"       # 对不存在的 key 进行 APPEND ，等同于 SET myphone "nokia"
(integer) 5                         # 字符长度
# 对已存在的字符串进行 APPEND
redis> APPEND myphone " - 1110"     # 长度从 5 个字符增加到 12 个字符
(integer) 12
redis> GET myphone
"nokia - 1110"

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