An algorithm for relational database watermarking is proposed in this paper, and it is applicable to protect the copyright of numeric data.

提出一种关系数据库水印算法，适用于数值型数据的版权保护。

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In this paper, the study reads as follows: First, based on the numeric attributes of a relational database watermarking technology research.

本文主要的研究内容如下：第一，基于数值型属性的关系数据库水印技术的研究。

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For example, if a numeric value you read from a database is negative, you might set the item's background color to red.

例如，如果从数据库读取的数值为负，则可以将该项的背景色设置为红色。

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For example, if a numeric value you read from a database is negative, you might set the item's background color to red.

例如，如果从数据库读取的数值为负，则可以将该项的背景色设置为红色。

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