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  • Redis

    G-聊 Redis

    Nosql概述

    Redis入门

    五大数据类型

    String (字符串)

    #字符串范围
    127.0.0.1:6379> set key1 "hello,gavy" #
    OK
    127.0.0.1:6379> get key1
    "hello,gavy"
    127.0.0.1:6379> getrange
    (error) ERR wrong number of arguments for 'getrange' command
    127.0.0.1:6379> GETRANGE key1 0 3
    "hell"
    127.0.0.1:6379> GETRANGE key1 0 -1
    "hello,gavy"
    127.0.0.1:6379>
    ################################################################

    127.0.0.1:6379> set
    (error) ERR wrong number of arguments for 'set' command
    127.0.0.1:6379> set key1 "hello,gavy"
    OK
    127.0.0.1:6379> get key1
    "hello,gavy"
    127.0.0.1:6379> getrange
    (error) ERR wrong number of arguments for 'getrange' command
    127.0.0.1:6379> GETRANGE key1 0 3
    "hell"
    127.0.0.1:6379> GETRANGE key1 0 -1
    "hello,gavy"
    127.0.0.1:6379>


    List (列表)

    Set (集合)

     

    ### Hash (哈希)

    127.0.0.1:6379> keys *
    (empty array)
    127.0.0.1:6379> HSET myhash field3 5
    (integer) 1
    127.0.0.1:6379> HSET myhash field3 6
    (integer) 0
    127.0.0.1:6379> HGET myhash field3
    "6"
    127.0.0.1:6379> HSET myhash field4 7 field5 8
    (integer) 2
    127.0.0.1:6379> keys *
    1) "myhash"
    127.0.0.1:6379> HKEYS *
    (empty array)
    127.0.0.1:6379> HKEYS myhash
    1) "field3"
    2) "field4"
    3) "field5"
    127.0.0.1:6379> HGET field4
    (error) ERR wrong number of arguments for 'hget' command
    127.0.0.1:6379> HGET myhash field4
    "7"
    127.0.0.1:6379>
    [root@ecs-kc1-small-1-linux-20200604230717 bin]#

    ZSet (有序集合)

    案例思路:set 排序 存储班级成绩表、工资表排序!

    普通消息,1 重要消息,2 带权重进行判断

    排行榜 取Top N

     

     

    三种特殊数据类型

    geospatial 地理位置

    georadius

     

     

    hyperloglog

    bitmaps

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  • 原文地址:https://www.cnblogs.com/CodingRoad7/p/13815086.html
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