redis学习笔记

redis的数据类型有：string，list，set，hash，zset五种类型。

1.string

操作命令：set 设置string的值

                get 获取string的值

                del 删除string的值

实例：

127.0.0.1:6379> set hello world
OK
127.0.0.1:6379> get hello
"world"
127.0.0.1:6379> del hello
(integer) 1
127.0.0.1:6379> get hello
(nil)

2，list

操作命令： lpush 在list的左边添加元素

                  rpush 在list的右边添加元素

                  lpop 从list 的左边弹出（删除）元素

                  rpop 从list 的右边弹出（删除）元素

                  lrange 获取list某个范围的元素

                  lindex 获取单个元素

实例：

127.0.0.1:6379> rpush list-key item2
(integer) 2
127.0.0.1:6379> rpush list-key item
(integer) 3
127.0.0.1:6379> lrange list-key 0-1
(error) ERR wrong number of arguments for 'lrange' command
127.0.0.1:6379> lrange list-key 0 -1
1) "item"
2) "item2"
3) "item"
127.0.0.1:6379> lindex list-key 1
"item2"
127.0.0.1:6379> lindex list-key 0
"item"
127.0.0.1:6379> lpush list-key item1
(integer) 4
127.0.0.1:6379> lrange list-key 0 -1
1) "item1"
2) "item"
3) "item2"
4) "item"
127.0.0.1:6379> lpop list-key 0
(error) ERR wrong number of arguments for 'lpop' command
127.0.0.1:6379> lpop list-key
"item1"
127.0.0.1:6379> lrange list-key
(error) ERR wrong number of arguments for 'lrange' command
127.0.0.1:6379> lrange list-key 0 2
1) "item"
2) "item2"
3) "item"

set集合：

操作命令：sadd 向set添加元素

                smemebers 获取集合的素有元素

                sismemeber 判断一个元素是否存在

                srem 删除一个元素

实例：

127.0.0.1:6379> sadd set-key item
(integer) 1
127.0.0.1:6379> sadd set-key item2
(integer) 1
127.0.0.1:6379> sadd set-key item
(integer) 0
127.0.0.1:6379> sadd set-key item3
(integer) 1
127.0.0.1:6379> smembers set-key
1) "item3"
2) "item2"
3) "item"
127.0.0.1:6379> smembers set-key
1) "item3"
2) "item2"
3) "item"
127.0.0.1:6379> smembers set-key
1) "item3"
2) "item2"
3) "item"
127.0.0.1:6379> smembers set-key
1) "item3"
2) "item2"
3) "item"
127.0.0.1:6379> sismember set-key item4
(integer) 0
127.0.0.1:6379> sismember set-key item3
(integer) 1
127.0.0.1:6379> srem set-key item3
(integer) 1
127.0.0.1:6379> srem set-key item3
(integer) 0
127.0.0.1:6379> smembers set-key
1) "item2"
2) "item"
127.0.0.1:6379> 

hash散列：

操作命令：hset 添加散列元素

                hget 获取散列元素

                hgetall 获取所有的散列元素

                hdel 删除散列元素

实例：

127.0.0.1:6379> hset hash-key sub-key1 value1
(integer) 1
127.0.0.1:6379> hset hash-key sub-key2 value2
(integer) 1
127.0.0.1:6379> hset hash-key sub-key1 value1
(integer) 0
127.0.0.1:6379> hgetall hash-key
1) "sub-key1"
2) "value1"
3) "sub-key2"
4) "value2"
127.0.0.1:6379> hdel hash-key sub-key2
(integer) 1
127.0.0.1:6379> hdel hash-key sub-key2
(integer) 0
127.0.0.1:6379> hget hash-key sub-key1
"value1"
127.0.0.1:6379> hgetall hash-key
1) "sub-key1"
2) "value1"
127.0.0.1:6379> 

zset有序集合：

 操作命令：zadd 添加有序集合元素

                  zrange 获取多个元素并返回排序中的位置

                  zrangebyscore 获取给定范围的元素

                  zrem 删除元素

实例：

127.0.0.1:6379> zadd zset-key 728 member1
(integer) 1
127.0.0.1:6379> zadd zset-key 982 member0
(integer) 1
127.0.0.1:6379> zadd zset-key 982 member0
(integer) 0
127.0.0.1:6379> zrange zset-key 0 -1 withscores
1) "member1"
2) "728"
3) "member0"
4) "982"
127.0.0.1:6379> zrangebyscore zset-key 0 800 withscores
1) "member1"
2) "728"
127.0.0.1:6379> zrange zset-key 0 -1
1) "member1"
2) "member0"
127.0.0.1:6379> zrem zset-key member1
(integer) 1
127.0.0.1:6379> zrem zset-key member1
(integer) 0
127.0.0.1:6379> zrange zset-key 0 -1
1) "member0"
127.0.0.1:6379> zrange zset-key 0 -1 withscores
1) "member0"
2) "982"
127.0.0.1:6379>