redis之Hash类型常用方法总结

redis之Hash类型常用方法总结

格式：

存--HMGET key field [field ...]

取--HMGET key field [field ...]

M：表示能取多个值，many

H：表示hash类型

基本操作

1. hmset key field value [field value ...] 设置hash字段和值

   127.0.0.1:6379> hmset hehe_key name "panlifu" age "100"
   OK
   127.0.0.1:6379> hgetall hehe_key
   1) "name"
   2) "panlifu"
   3) "age"
   4) "100"
   127.0.0.1:6379> hmget hehe_key name
   1) "panlifu"
   127.0.0.1:6379> hmget hehe_key age
   1) "100"
   127.0.0.1:6379>
   

2. hmget key field [field ...] 获取哈希表中某个字段的值

   127.0.0.1:6379> hmset hehe_key name "panlifu" age "100"
   OK
   127.0.0.1:6379> hmget hehe_key name
   1) "panlifu"
   127.0.0.1:6379> hmget hehe_key age
   1) "100"
   127.0.0.1:6379>
   

3. hgetall key 获取哈表表中所有字段的值及字段

   127.0.0.1:6379> hmset hehe_key name "panlifu" age "100"
   OK
   127.0.0.1:6379> hgetall hehe_key
   1) "name"
   2) "panlifu"
   3) "age"
   4) "100"
   

4. hdel key field [field ...] 删除一个或多个哈希表字段

   127.0.0.1:6379> hmset hehe_key name "panlifu" age "100"
   OK
   127.0.0.1:6379> hmget hehe_key name
   1) "panlifu"
   127.0.0.1:6379> hmget hehe_key age
   1) "100"
   127.0.0.1:6379> hdel hehe_key name
   (integer) 1
   127.0.0.1:6379> hmget hehe_key name
   1) (nil)
   

5. hexists key field 查看哈希表中，指定的字段是否存在，存在返回1，不存在（哈希表或指定字段不存在）返回0

   127.0.0.1:6379> hmset hehe name panlifu  sex  boy
   OK
   127.0.0.1:6379> hexists keke name
   (integer) 0
   127.0.0.1:6379> hexists hehe name
   (integer) 1
   

6. hget key field 获取存储在哈希表中指定字段的值

   127.0.0.1:6379> hmset hehe_key name "panlifu" age "100"
   OK
   127.0.0.1:6379> hgetall hehe_key
   1) "name"
   2) "panlifu"
   3) "age"
   4) "100"
   127.0.0.1:6379> hmget hehe_key name
   1) "panlifu"
   127.0.0.1:6379> hmget hehe_key age
   1) "100"
   127.0.0.1:6379>
   

7. hset key field 设置存储在哈希表中指定字段的值（只能存储一个）

   127.0.0.1:6379> hset hehe age 10
   (integer) 0
   127.0.0.1:6379> hget hehe age
   "10"
   

8. hincrby key field increment 为哈希表 key 中的指定字段的整数值加上增量 increment

   127.0.0.1:6379> hset hehe age 10
   (integer) 0
   127.0.0.1:6379> hget hehe age
   "10"
   127.0.0.1:6379> hincrby hehe age 1	# hash表hehe中的age字段的值增加1
   (integer) 11
   127.0.0.1:6379> hget hehe age
   "11"
   

9. hincrbyfloat key field increment 为哈希表 key 中的指定字段的浮点数值加上增量 increment 。

   127.0.0.1:6379> hset hehe height 1.8
   (integer) 1
   127.0.0.1:6379> hincrbyfloat hehe height 0.5
   "2.3"
   127.0.0.1:6379> hget hehe height
   "2.3"
   

10. hkeys key 获取所有哈希表中的字段

    127.0.0.1:6379> hkeys hehe
    1) "name"
    2) "age"
    3) "sex"
    4) "height"
    

11. hlen key 获取哈希表中字段的数量

    127.0.0.1:6379> hkeys hehe
    1) "name"
    2) "age"
    3) "sex"
    4) "height"
    127.0.0.1:6379> hlen hehe
    (integer) 4
    

12. hsetnx key field value 只有在字段 field 不存在时，设置哈希表字段的值。

    127.0.0.1:6379> hgetall hehe
    1) "name"
    2) "panlifu"
    3) "age"
    4) "11"
    5) "sex"
    6) "boy"
    7) "height"
    8) "2.3"
    127.0.0.1:6379> hsetnx hehe name lt
    (integer) 0
    127.0.0.1:6379> hgetall hehe
    1) "name"
    2) "panlifu"
    3) "age"
    4) "11"
    5) "sex"
    6) "boy"
    7) "height"
    8) "2.3"
    

13. hvals key 获取哈希表中所有值

    127.0.0.1:6379> hgetall hehe
    1) "name"
    2) "panlifu"
    3) "age"
    4) "11"
    5) "sex"
    6) "boy"
    7) "height"
    8) "2.3"
    127.0.0.1:6379> hvals hehe
    1) "panlifu"
    2) "11"
    3) "boy"
    4) "2.3"
    

14. HSCAN key cursor [MATCH pattern] [COUNT count] 迭代哈希表中的键值对。

    # 1. 查看hash表pms:1中有多少条记录
    127.0.0.1:6379[1]> hgetall pms:1
     1) "stock"
     2) "12"
     3) "freeze"
     4) "10"
     5) "stock:1"
     6) "11"
     7) "stock:2"
     8) "23"
     9) "stock:freeze:1"
    10) "111"
    11) "stock:5"
    12) "1212"
    
    # 2. 模糊查看pms:1下的键
    127.0.0.1:6379[1]> hscan pms:1 0 match stock:* count 100
    1) "0"
    2) 1) "stock:1"
       2) "11"
       3) "stock:2"
       4) "23"
       5) "stock:freeze:1"
       6) "111"
       7) "stock:5"
       8) "1212"
    
    # 3. 模糊查看pms:1下的键
    127.0.0.1:6379[1]> hscan pms:1 0 match stock* count 100
    1) "0"
    2)  1) "stock"
        2) "12"
        3) "stock:1"
        4) "11"
        5) "stock:2"
        6) "23"
        7) "stock:freeze:1"
        8) "111"
        9) "stock:5"
       10) "1212"
    
    # 4. 模糊查看pms:1下的键
    127.0.0.1:6379[1]> hscan pms:1 0 match stock:freeze:* count 100
    1) "0"
    2) 1) "stock:freeze:1"
       2) "111"
    
    # 5. 查看有多少个键
    127.0.0.1:6379[1]> keys *
     1) "pms:1"
     2) "pms:freeze:21"
     3) "pms:10"
     4) "pms:11"
     5) "pms:9"
     6) "pms:4"
     7) "name"
     8) "pms:5"
     9) "pms:8"
    10) "pms:7"
    11) "pms:2"
    12) "go:123"
    13) "pms:3"
    14) "pms:6"
    
    # 6. 模糊查找pms:*的键
    127.0.0.1:6379[1]> scan 0 match pms:* count 10
    1) "3"
    2) 1) "pms:1"
       2) "pms:8"
       3) "pms:freeze:21"
       4) "pms:5"
       5) "pms:11"
       6) "pms:9"
       7) "pms:4"
       8) "pms:3"
       9) "pms:6"
    
    # 7. 模糊查找pms:*的键，游标从3开始
    127.0.0.1:6379[1]> scan 3 match pms:* count 10
    1) "0"
    2) 1) "pms:10"
       2) "pms:7"
       3) "pms:2