📌  相关文章
📜  Redis-哈希

📅  最后修改于: 2020-11-26 07:02:36             🧑  作者: Mango

Redis哈希是字符串字段和字符串值之间的映射。因此，它们是代表对象的理想数据类型。

在Redis中，每个哈希可以存储多达40亿个字段-值对。

例

redis 127.0.0.1:6379> HMSET tutorialspoint name "redis tutorial" 
description "redis basic commands for caching" likes 20 visitors 23000 
OK 
redis 127.0.0.1:6379> HGETALL tutorialspoint  
1) "name" 
2) "redis tutorial" 
3) "description" 
4) "redis basic commands for caching" 
5) "likes" 
6) "20" 
7) "visitors" 
8) "23000"

在上面的示例中，我们在名为“ tutorialspoint”的哈希中设置了Redis教程详细信息(名称，描述，喜欢，访问者)。

Redis哈希命令

下表列出了一些与哈希相关的基本命令。

Sr.No Command & Description
1 HDEL key field2 [field2]

Deletes one or more hash fields.
2 HEXISTS key field

Determines whether a hash field exists or not.
3 HGET key field

Gets the value of a hash field stored at the specified key.
4 HGETALL key

Gets all the fields and values stored in a hash at the specified key
5 HINCRBY key field increment

Increments the integer value of a hash field by the given number
6 HINCRBYFLOAT key field increment

Increments the float value of a hash field by the given amount
7 HKEYS key

Gets all the fields in a hash
8 HLEN key

Gets the number of fields in a hash
9 HMGET key field1 [field2]

Gets the values of all the given hash fields
10 HMSET key field1 value1 [field2 value2 ]

Sets multiple hash fields to multiple values
11 HSET key field value

Sets the string value of a hash field
12 HSETNX key field value

Sets the value of a hash field, only if the field does not exist
13 HVALS key

Gets all the values in a hash
14 HSCAN key cursor [MATCH pattern] [COUNT count]

Incrementally iterates hash fields and associated values