关于“通过 BigQuery ML 创建机器学习模型：实验室挑战赛”的评价

Paulina A. · 已于 9 months前审核

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Soon Meng L. · 已于 9 months前审核

I do not understand what I am doing wrong in my query for the evaluation step. SELECT roc_auc FROM ML.EVALUATE( MODEL --`ecommerce.customer_classification_model` --`data-to-insights.ecommerce.classification_model` `qwiklabs-gcp-03-dd574b725332.ecommerce.customer_classification_model` , (( SELECT * EXCEPT(fullVisitorId) FROM # features (( SELECT fullVisitorId, IFNULL(totals.bounces, 0) AS bounces, IFNULL(totals.timeOnSite, 0) AS time_on_site FROM `data-to-insights.ecommerce.web_analytics` WHERE totals.newVisits = 1 AND date BETWEEN '20170430' AND '20170630') # train on first 9 months JOIN (SELECT fullvisitorid, IF(COUNTIF(totals.transactions > 0 AND totals.newVisits IS NULL) > 0, 1, 0) AS will_buy_on_return_visit FROM `data-to-insights.ecommerce.web_analytics` GROUP BY fullvisitorid) USING (fullVisitorId) ) )) )

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