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

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>

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>

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"

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)

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

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>

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"
```

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"

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"

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"

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

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"

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"

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

相关阅读:
SQL集合函数中case when then 使用技巧
 appium -- 页面出现弹窗，关闭后，无法识别页面元素
 SQLite3中dos命令下退出"...>"状态的方法
 android SharedPreferences 浅析
 BigDecimal简单说
 appium-手势密码实现-automationName 是Appium的情况
 Android color颜色-色号总结
 adb启动和关闭
 DesiredCapabilities的作用
 Android 使用intent传递返回值：startActivityForResult()与onActivityResult()与setResult()参数分析，activity带参数的返回
原文地址：https://www.cnblogs.com/plf-Jack/p/11080461.html