image-20230220172907736

  • 通用命令

    • KEYS查看所有符合模板的keys，损耗性能不建议使用

    • DEL删除n个指定key

    • EXISTS查看指定key是否操作

    • EXPIRE设置有效期，单位s

    • TTL查询剩余有效期

      为-1时表示永久有效

  • String类型

    image-20230221163951094

    image-20230221171230034

    • SET添加或者修改已经存在的的键值对
      • SET key value
      • SET key value [nx] [ex [expire]]
    • GET获取指定key的value
    • MSET批量添加多个Strinf类型的键值对
    • MGET获取多个key的value
    • INCR让整型类型自增1
    • INCRBY让整型类型自增指定步长
    • INCRBYFLOAT让浮点类型自增指定步长
    • SETNX添加一个不存在的key，如果key存在，则不进行任何操作
    • SETEX添加指定key的value，并且设置有效期
      • SETEX key expire value

  • Hash类型

    image-20230221171432233

    常见命令

    • HSET添加或修改指定key的field的值
    • HGET获取指定key的field的值
    • HMSET批量
    • HMGET批量
    • HGETALL获取指定key所有的field和value
    • HKEYS获取指定key所有的field
    • HVALS获取指定key所有的value
    • HINCRBY指定key的指定field自增指定步长
    • HSETNX指定key的field是否存在，不存在则添加

  • List类型

    image-20230221185139963

    image-20230221185359862

    运行测试

    127.0.0.1:6379[1]> LPUSH user a b c
(integer) 3
127.0.0.1:6379[1]> RPUSH user x y z
(integer) 6
127.0.0.1:6379[1]>

    image-20230221185836460

    127.0.0.1:6379[1]> LPOP user
"c"
127.0.0.1:6379[1]> RPOP user
"z"

    image-20230221185948464

  • Set类型

    image-20230221190537920

    image-20230221191050827

    练习测试

    127.0.0.1:6379[1]> SADD s1 a b c 9 8 7
(integer) 6
127.0.0.1:6379[1]> SADD s2 b c 9 8 x y z
(integer) 7
127.0.0.1:6379[1]> SMEMBERS s1
1) "c"
2) "b"
3) "a"
4) "8"
5) "9"
6) "7"
127.0.0.1:6379[1]> SREM s1 a b
(integer) 2
127.0.0.1:6379[1]> SMEMBERS s1
1) "c"
2) "8"
3) "9"
4) "7"
127.0.0.1:6379[1]> SCARD s1
(integer) 4
127.0.0.1:6379[1]> SISMEMBER s1 a
(integer) 0
127.0.0.1:6379[1]> SISMEMBER s1 c
(integer) 1
127.0.0.1:6379[1]> SINTER s1 s2
1) "c"
2) "8"
3) "9"
127.0.0.1:6379[1]> SDIFF s1 s2
1) "7"
127.0.0.1:6379[1]> SDIFF s2 s1
1) "y"
2) "z"
3) "x"
4) "b"
127.0.0.1:6379[1]> SUNION s1 s2
1) "x"
2) "c"
3) "8"
4) "b"
5) "y"
6) "z"
7) "9"
8) "7"
    SDIFF key1 key2 比较的是key1中,key2所没有的，两者对调，结果不同

    image-20230221192122191

    127.0.0.1:6379[1]> SADD zhangsan lisi wangwu  zhaoliu
(integer) 3
127.0.0.1:6379[1]> SADD lisi wangwu mazi ergou
(integer) 3
127.0.0.1:6379[1]> SCARD zhangsan
(integer) 3
127.0.0.1:6379[1]> SINTER zhangsan lisi
1) "wangwu"
127.0.0.1:6379[1]> SDIFF zhangsan lisi
1) "zhaoliu"
2) "lisi"
127.0.0.1:6379[1]> SUNION zhangsan lisi
1) "zhaoliu"
2) "lisi"
3) "wangwu"
4) "ergou"
5) "mazi"
127.0.0.1:6379[1]> SISMEMBER zhangsan lisi
(integer) 1
127.0.0.1:6379[1]> SISMEMBER lisi zhangsan
(integer) 0
127.0.0.1:6379[1]> SREM zhangsan lisi
(integer) 1

  • SortedSet类型

    image-20230221192328304

    底层与Set差异较大

    image-20230221192935171

    测试练习

    image-20230221193433967

    image-20230221193424555

    127.0.0.1:6379[1]> ZADD stus 85 Jack 89 Lucy 82 Rose 95 Tom 78 Jerry 92 Amy 76 Miles
(integer) 7
127.0.0.1:6379[1]> ZREM stus Tom
(integer) 1
127.0.0.1:6379[1]> ZSCORE stus Amy
"92"
127.0.0.1:6379[1]> ZRANK stus Rose
(integer) 2
127.0.0.1:6379[1]> ZCOUNT stus 0 80
(integer) 2
127.0.0.1:6379[1]> ZINCRBY stus 2 Amy
"94"
127.0.0.1:6379[1]> ZREVRANGE stus 0 2
1) "Amy"
2) "Lucy"
3) "Jack"
127.0.0.1:6379[1]> ZRANGEBYSCORE stus 0 80
1) "Miles"
2) "Jerry"