Redis hash类型常见命令

曾经终败给现在 2023-09-28 10:08 9阅读 0赞

[Ptw-cwl][]

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#### HSET：添加或者修改hash类型key的field的值 ####

127.0.0.1:6379> help hset
    
      HSET key field value [field value ...]
      summary: Set the string value of a hash field
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

添加user下的name zhangsan 和age 18

127.0.0.1:6379> hset user name zhangsan 
    (integer) 1
    127.0.0.1:6379>

#### HGET：获取一个hash类型key的field的值 ####

127.0.0.1:6379> help hget
    
      HGET key field
      summary: Get the value of a hash field
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

获取user下的name的值

127.0.0.1:6379> hget user name 
    "zhangsan"
    127.0.0.1:6379>

#### HMSET：批量添加多个hash类型key的field的值 ####

127.0.0.1:6379> help hmset
    
      HMSET key field value [field value ...]
      summary: Set multiple hash fields to multiple values
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

批量添加user下的name lisi和age15

127.0.0.1:6379> hmset user name lisi age 15
    OK
    127.0.0.1:6379>

#### HMGET：批量获取多个hash类型key的field的值 ####

127.0.0.1:6379> help hmget
    
      HMGET key field [field ...]
      summary: Get the values of all the given hash fields
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

批量获取user下的name、age的值

127.0.0.1:6379> hmget user name age
    1) "lisi"
    2) "15"
    127.0.0.1:6379>

#### HGETALL：获取一个hash类型的key中的所有的field和value ####

127.0.0.1:6379> help hgetall
    
      HGETALL key
      summary: Get all the fields and values in a hash
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

获取user下的所有field 和 value

127.0.0.1:6379> hgetall user
    1) "name"
    2) "lisi"
    3) "age"
    4) "15"
    127.0.0.1:6379>

#### HKEYS：获取一个hash类型的key中的所有的field ####

127.0.0.1:6379> help hkeys
    
      HKEYS key
      summary: Get all the fields in a hash
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

获取user下的所有的field

127.0.0.1:6379> hkeys user
    1) "name"
    2) "age"
    127.0.0.1:6379>

#### HVALS：获取一个hash类型的key中的所有的value ####

127.0.0.1:6379> help hvals
    
      HVALS key
      summary: Get all the values in a hash
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

获取user下的所有的value

127.0.0.1:6379> hvals user
    1) "lisi"
    2) "15"
    127.0.0.1:6379>

#### HINCRBY:让一个hash类型key的字段值自增并指定步长 ####

127.0.0.1:6379> help hincrby
    
      HINCRBY key field increment
      summary: Increment the integer value of a hash field by the given number
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

将user下的age变为18

127.0.0.1:6379> hget user age
    "15"
    127.0.0.1:6379> hincrby user age 2
    (integer) 17
    127.0.0.1:6379> hincrby user age 1
    (integer) 18
    127.0.0.1:6379>

#### HSETNX：添加一个hash类型的key的field值，前提是这个field不存在，否则不执行 ####

127.0.0.1:6379> help hsetnx
    
      HSETNX key field value
      summary: Set the value of a hash field, only if the field does not exist
      since: 2.0.0
      group: hash
    
    127.0.0.1:6379>

**示例：**

添加user下的name zhangsan，如果不成功则添加user下的name1 zhangsan

127.0.0.1:6379> hsetnx user name zhangsan
    (integer) 0
    127.0.0.1:6379> hsetnx user name1 zhangsan
    (integer) 1
    127.0.0.1:6379>

[Ptw-cwl][]

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[Ptw-cwl]: https://blog.csdn.net/qq_62701769