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                            ![](https://box.kancloud.cn/fa4b408f1ec8183294adeb4cbb78c56e_504x222.png)

一個散列類型的鍵最多包含2^32-1

散列類型適合存儲對象，使用對象類別和ID構成鍵名。使用字段表示對象的屬性，字段值表示屬性值。

相對關系型數據庫的優點：
![](https://box.kancloud.cn/e42d5818a2d8c8df03fb4d8286f1c399_708x117.png)

命令：
hset         key    field    value
hsetnx     key    field    value
hget        key     field
hgetall    key
hmset     key   field   value    field   value......
hdel        key   field
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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