數據庫鎖

原創 放羊的大飞 2020-04-02 02:35

一、數據庫層面支持高併發系統

 

二、數據庫鎖

 

三、ORM框架

    1. Object Relational Mapping 對象關係映射，描述對象和數據庫之間映射的元數據，將程序中的對象自動持久化到關係數據庫中，數據持久層框架。(對象和數據庫之間的橋樑)

    2. 類 --> 表       
        類的屬性 --> 表字段         
        類的對象 --> 表中的一條數據

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