Data integration can involve complex transformation rules, error checking and data standardization techniques.

数据集成可以涉及复杂的转换规则，错误检查和数据标准化技术。

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Aiming at synopsis computation of approximate query in data stream, a novel wavelet transformation algorithm, Minimum Error based Dimension Compression (MEDC) algorithm, is proposed in this paper.

针对数据流上近似查询中的梗概计算，提出了一种新的基于最小误差的维压缩小波变换算法(MEDC)。

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