什么是SQL中的映射? [英] What is mapping in SQL ?

问题描述

嗨

我正在寻找SQL中映射的正确定义.我无法从互联网上找到任何好的资源.
请给我发送链接或说明您是否可以.


谢谢

Hi

I am looking for proper definition of mapping in SQL. I cant find any good resource from internet.
Please send me links or explain if you can.


Thanks

推荐答案

映射是两个实体之间的logical connection.

在SQL中，您可以映射
数据库 [数据类型 [表到对象 [将SQL类型转换为JAVA类型 [使用要求SQL映射 [ pdf格式的详细信息 [

Mapping is logical connection between two entities.

In SQL, you can Map
Database[^],
Data types[^],
Tables to Objects[^]
SQL types to JAVA types[^]

Also refer this thread for more:
Requirements for using SQL mapping[^]

Here are more Details in pdf[^]

那里在SQL中没有映射的概念.

您可以将编程数据类型映射到SQL特定的数据类型，也可以将对象"映射到表".

There is no notion of mapping in SQL.

You can map programming data types to SQL specific data types, you can map "objects" to "tables".

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