For example, an analytical application might require sales information contained in a large fact table to be retrieved by product, by region, and by date (three dimensions).
例如,分析应用程序可能需要按产品、地区和日期(三个维)获取一个大型事实表中的销售信息。
Defining the local column as DATE is convenient because it allows predicates that involve DATE literals, but does not require casting functions (which tend to impact performance).
将本地列定义为DATE类型比较方便,因为这样可以允许涉及DATE文字但是不需要覆盖函数(对性能有影响)的谓词。
Countries require assistance with the adaptation process to ensure that guidelines are valid and up to date and accurately reflect WHO global clinical care recommendations for patients with HIV.
许多国家需要得到修改流程的相关帮助,确保指南的有效性和及时性,并能准确反映WHO对HIV病人的全球临床关爱建议。
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