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  • Redis哈希-hash

    Redis的hash类型数据存储极为重要

    hset K V  赋值一个hash 其中V为 (key, value)

    127.0.0.1:6379> hset user id 1
    (integer) 1
    127.0.0.1:6379> hset user name z3
    (integer) 1
    127.0.0.1:6379>

    hget 获取hash值

    127.0.0.1:6379> hget user id
    "1"
    127.0.0.1:6379> hget user name
    "z3"
    127.0.0.1:6379>

    hmset/hmget 一次可以批量存取

    127.0.0.1:6379> hmset cumtomer name z3 age 11 id 1
    OK
    127.0.0.1:6379> hmget cumtomer name age id
    1) "z3"
    2) "11"
    3) "1"
    127.0.0.1:6379>

    hgetall  可以取出所有的key-value

    127.0.0.1:6379> hgetall cumtomer
    1) "name"
    2) "z3"
    3) "age"
    4) "11"
    5) "id"
    6) "1"
    127.0.0.1:6379>

    hdel 删除一个值

    127.0.0.1:6379> hdel user name
    (integer) 1
    127.0.0.1:6379>

    hlen 可以获取长度

    127.0.0.1:6379> hlen user
    (integer) 1
    127.0.0.1:6379> hlen cumtomer
    (integer) 3
    127.0.0.1:6379>

    hexists key 在key里面的某个值的key (判断某个key是否存在)

    127.0.0.1:6379> HEXISTS cumtomer id
    (integer) 1
    127.0.0.1:6379> hexists cumtomer name
    (integer) 1
    127.0.0.1:6379> hexists cumtomer email
    (integer) 0
    127.0.0.1:6379>

    hkeys/hvals 取出所有的key/value

    127.0.0.1:6379> hkeys cumtomer
    1) "name"
    2) "age"
    3) "id"
    127.0.0.1:6379> hvals cumtomer
    1) "z3"
    2) "11"
    3) "1"
    127.0.0.1:6379>

    hincrby/hincrbyfloat

    127.0.0.1:6379> HINCRBY cumtomer age 2
    (integer) 13
    127.0.0.1:6379> HINCRBY cumtomer age 2
    (integer) 15
    127.0.0.1:6379> HINCRBY cumtomer age 2
    (integer) 17
    127.0.0.1:6379> hset cumtomer score 91.5
    (integer) 1
    127.0.0.1:6379> HINCRBYFLOAT cumtomer score 0.5
    "92"
    127.0.0.1:6379> HINCRBYFLOAT cumtomer score 0.5
    "92.5"
    127.0.0.1:6379>

    hsetnx 如果不存在则添加,如果存在不改变

    127.0.0.1:6379> hsetnx cumtomer age 26
    (integer) 0
    127.0.0.1:6379> hsetnx cumtomer email abc@email.com
    (integer) 1
    127.0.0.1:6379>

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  • 原文地址:https://www.cnblogs.com/wq3435/p/6079744.html
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