redis datastruct

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Redis是一种key-value的基于内存数据结构存储系统，它可以用作数据库、缓存和消息中间件库。Redis有5种数据结构strings,lists,sets,sorted sets,hashes。

strings

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PUT key value
GET key
DEL key
EXPIRE key time
TTL key

lists

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LPUSH key value
RPUSH key value
LPOP 
RPOP
LRANGE start end

sets

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SADD key value
SREM key value
SISMEMBER key value
SMEMBERS key

sorted sets

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ZADD hackers 2 Bob
ZADD hackers 1 Alan
ZADD hackers 1 Zbra
ZRANGE hackers 0 -1

hashes

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HSET user:1000 name Rick
HSET user:1000 age 38
HSET user:1000 email "rick@amc.com"
HGETALL user:1000 
	=> 1) "name"
	2) "Rick"
	3) "age"
	4) "38"
	5) "email"
	6) "rick@gmail.com"
HGET user:1000 name => Rick
HINCRBY user:1000 age 1=> integer 39
HINCRBY user:1000 age 11=> integer 50
HDEL user:1000 age
HINCRBY user:1000 age 11=> integer 11
HMSET user:1000 name Rick age 38 email rick@amc.com