A column set to the AutoNumber data type often makes a good primary key.
设置为“自动编号”数据类型的列通常是很好的主键。
Reduct calculation is the key issue of the research of rough set based data mining.
简约的计算是基于粗糙集理论的数据采掘研究的关键问题。
How to: Set a Data Column as the Primary Key.
如何：将数据列设置为主键。
How to: Set a Data Column as the Primary Key.
如何：将数据列设置为主键。
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