(10-4)redis-hash数据类型

向右看齐 2022-08-08 06:39 223阅读 0赞

启动redis：
    [root@baozi ~]# redis-server /etc/redis.conf
    [root@baozi ~]# redis-cli
    127.0.0.1:6379>
    
    
    redis数据类型--hash
    1、hash类型的值存储了字段和字段值的映射，字段值只能是字符串，不支持其它数据类型；
    2、hash类型的键至多可以存储 2^32 - 1 个字段；
    3、redis可以为任何键增减字段而不影响其它键；
    
    
    
    login as: root
    root@192.168.1.200's password: ******
    Last login: Fri May  8 20:00:51 2015 from 192.168.1.1
    [root@baozi ~]# redis-server /etc/redis.conf
    [root@baozi ~]# redis-cli
    
    //设置字段属性值
    127.0.0.1:6379> hset user:100 name zs
    (integer) 1
    127.0.0.1:6379> hset user:100 age 20
    (integer) 1
    127.0.0.1:6379> hget user:100 name
    "zs"
    127.0.0.1:6379> hget user:100 age
    "20"
    
    
    //设置多值
    127.0.0.1:6379> hmset user:101 name ls age 19 bir 1992-05-28
    OK
    127.0.0.1:6379> hmget user:100 name age
    1) "zs"
    2) "20"
    127.0.0.1:6379>
    
    
    //获得所有值
    127.0.0.1:6379> hgetall user:101
    1) "name"
    2) "ls"
    3) "age"
    4) "19"
    5) "bir"
    6) "1992-05-28"
    
    //获得字段
    127.0.0.1:6379> hkeys user:101
    1) "name"
    2) "age"
    3) "bir"
    
    //获得字段值
    127.0.0.1:6379> hvals user:101
    1) "ls"
    2) "19"
    3) "1992-05-28"
    127.0.0.1:6379>
    
    
    
    //判断hash键是否存在
    127.0.0.1:6379> exists user:101
    (integer) 1
    
    //判断字段是否存在
    127.0.0.1:6379> hexists user:100 bir
    (integer) 0
    127.0.0.1:6379> hexists user:101 bir
    (integer) 1
    
    //自定义增加字段值
    127.0.0.1:6379> hget user:100 age
    "20"
    127.0.0.1:6379> hincrby user:100 age 2
    (integer) 22
    
    //删除某个字段
    127.0.0.1:6379> hdel user:101 bir
    (integer) 1
    
    //获取某个键所有字段数
    127.0.0.1:6379> hlen user:101
    (integer) 2
    127.0.0.1:6379>
    
    
    //退出redis
    127.0.0.1:6379> shutdown
    not connected> quit
    [root@baozi ~]#