关联式资料库资料表中的资料列并没有唯一的识别。

Rows in a relational database table do not have unique identities.

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例如，试想将资料储存在关联式资料库、文字档、XML 档、试算表及报告中的企业。

For example, consider a business that stores data in relational databases, text files, XML files, spreadsheets, and reports.

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例如，试想将资料储存在关联式资料库、文字档、XML 档、试算表及报告中的企业。

For example, consider a business that stores data in relational databases, text files, XML files, spreadsheets, and reports.

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