如果目标模型跨多个表，数据差异分析还必须考虑数据键和键关系，以便有效地链接数据元素。
Where the target model is spread across multiple tables, the data Gap Analysis must also consider data keys and key relationships to effectively link data elements together.
这个过程有助于在后面的属性或数据差异分析中通过定义的术语将数据源映射到目标模型。
This process can contribute to subsequent Attribute or data Gap Analyses in mapping data sources against target model through the defined terms.
在收集业务需求并研究业务和数据环境之后，您就可以执行差异分析了。
After collecting business requirements and researching the business and data environment, you can perform gap analysis.
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