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Tableau Prep即学即用
book

Tableau Prep即学即用

by Carl Allchin
August 2022
Beginner to intermediate
463 pages
9h 22m
Chinese
China Electric Power Press Ltd.
Content preview from Tableau Prep即学即用
354
39
39.2
数据支撑所解决的问题
数据支撑技术解决了几个难题,其中许多问题由于订阅收费模式──一种付款计划,
其中消费者定期支付较小的金额,而不是一次性大额购买──而迅速变得更加普遍。
订阅音乐、软件和食品服务越来越受欢迎,这为数据分析师创造了更多的需求,使
他们能够处理订阅数据。然而,数据支撑不仅仅用于解决订阅型数据集的挑战。它
还可以在这些领域提供帮助:
客户保持分析
报告预期收入可能是自以为是的。仅仅因为客户签署了一个基于订阅的产品,
并不意味着他们会保持这些付款。支撑可以帮助你删除预计收入的行数据,以
更准确地确定客户被保持下来的水平。
通货膨胀
/
汇率
根据订阅时间的长短,你可能需要考虑通货膨胀或汇率变化等因素,以便准确
地提示赚取的收入。预测这些数值本身就是一门艺术,但使用数据支撑进行常
规预测可以大大提高分析的价值。通常情况下,预测值会存储在二级参考表中,
需要和支撑数据一起连接到原始数据集中。
数据重复
如果你有一些字段是在某记录所包含的时期汇总的,然后对其进行支撑操作,
则需要将这些值按时段数量进行划分,以避免重复的汇总。
39.3
数据支撑带来的挑战
虽然数据支撑技术确实提供了额外的分析所需的数据行,但它带来了另一个需要考
虑的挑战。
支撑将使你所分析的数据集的尺寸大幅度增加。这带来了以下方面的挑战:
数据存储
数据集越大,你需要的存储容量就越大。
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Publisher Resources

ISBN: 9787519864439