#Redis simple data manipulation (CRUD):
String type string
1. 存储： set key value
127.0.0.1:6379> set username zhangsan
OK
2. 获取： get key
127.0.0.1:6379> get username
"zhangsan"
以下同理：
127.0.0.1:6379> set age 23
OK
127.0.0.1:6379> get age
"23"
127.0.0.1:6379> set age 33
OK
127.0.0.1:6379> get age
"33"
3. 删除： del key
127.0.0.1:6379> del age
(integer) 1
127.0.0.1:6379> get age
(nil)Type hash hash
1. 存储： hset key field value
127.0.0.1:6379> hset myhash username lisi
(integer) 1
127.0.0.1:6379> hset myhash password 123
(integer) 1
2. 获取：
127.0.0.1:6379> hget myhash username
"lisi"
127.0.0.1:6379> hgetall myhash
1) "username"
2) "lisi"
3) "password"
4) "123"
3. 删除： hdel key field
127.0.0.1:6379> hdel myhash username
(integer) 1
127.0.0.1:6379> hget myhash username
(nil)List type list:
An element can be added to the head of the list (left) or a tail portion (right side)
the underlying implementation of the principle of self-determination was constructed using a stack data structure.
1. 添加：
1. 左插入
127.0.0.1:6379> lpush mylist a
(integer) 1
127.0.0.1:6379> lpush mylist b
(integer) 2
2. 右插入
127.0.0.1:6379> rpush mylist c
(integer) 3
2. 获取：
127.0.0.1:6379> lrange mylist 0 -1
1) "b"
2) "a"
3) "c"
3. 删除（删除后会有返回值）：
1. 从左侧删除
127.0.0.1:6379> lpop mylist
"b"
127.0.0.1:6379> lrange mylist 0 -1
1) "a"
2) "c"
2. 从右侧删除
127.0.0.1:6379> rpop mylist
"c"
127.0.0.1:6379> lrange mylist 0 -1
1) "a"
4. 可以插入重复值
127.0.0.1:6379> lpush mylist a
(integer) 2
127.0.0.1:6379> lrange mylist 0 -1
1) "a"
2) "a"Collection types set
Do not allow duplicate elements
1. 存储：sadd key value
127.0.0.1:6379> sadd myset a
(integer) 1
127.0.0.1:6379> sadd myset a
(integer) 0
第二行存入又一个a，但是改变行为0，代表没有插入成功
2. 获取：smembers key:获取set集合中所有元素
127.0.0.1:6379> smembers myset
1) "a"
一次性插入多条数据
127.0.0.1:6379> sadd myset b c d
(integer) 3
127.0.0.1:6379> smembers myset
1) "d"
2) "b"
3) "a"
4) "c"
3. 删除：srem key value:删除set集合中的某个元素
删除的同时会有返回值
127.0.0.1:6379> srem myset a
(integer) 1
127.0.0.1:6379> smembers myset
1) "d"
2) "b"
3) "c"Indexed collections sortedset:
It does not allow duplicate elements and sequential elements. Each element will be associated with a type of score double. It is to redis from small to large order of collection of member passing score.
1. 存储：zadd key score value
127.0.0.1:6379> zadd mysort 60 zhangsan
(integer) 1
127.0.0.1:6379> zadd mysort 50 zan
(integer) 1
127.0.0.1:6379> zadd mysort 80 wangwuan
(integer) 1
2. 获取：zrange key start end [withscores]
127.0.0.1:6379> zrange mysort
(error) ERR wrong number of arguments for 'zrange' command
127.0.0.1:6379> zrange mysort 0 -1
1) "zan"
2) "zhangsan"
3) "wangwuan"
127.0.0.1:6379> zrange mysort 0 -1 withscores
1) "zan"
2) "50"
3) "zhangsan"
4) "60"
5) "wangwuan"
6) "80"
覆盖数据后重新排序：
127.0.0.1:6379> zadd mysort 509 zan
(integer) 0
127.0.0.1:6379> zrange mysort 0 -1 withscores
1) "zhangsan"
2) "60"
3) "wangwuan"
4) "80"
5) "zan"
6) "509"
3. 删除：zrem key value
127.0.0.1:6379> zrem mysort zan
(integer) 1
127.0.0.1:6379> zrange mysort 0 -1 withscores
1) "zhangsan"
2) "60"
3) "wangwuan"
4) "80"Spoken instructions
1. keys * : 查询所有的键
2. type key ： 获取键对应的value的类型
3. del key：删除指定的key value
127.0.0.1:6379> keys *
1) "mysort"
2) "myhash"
3) "mylist"
4) "username"
5) "myset"
127.0.0.1:6379> get username
"zhangsan"
127.0.0.1:6379> type username
string
127.0.0.1:6379> type mylist
list
127.0.0.1:6379>redis error message:
[6644] 02 Apr 23:11:58.976 # Creating Server TCP listening socket *:6379: bind: No such file or directoryWhen such statements appear, generally there has been no closed redis server or the client's cause, so the solution is usually all redis server and client gave closed, then open it again