关于“使用 Join 和 Union 创建数据仓库”的评价

Warning, there is a little mistake on the first question: "How many Aluminum Handy Emergency Flashlights have been ordered?" Should be "How many Aluminum Handy Emergency Flashlight have been ordered?" (without the 's' on "Flashlights")

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Anil S. · 已于 about 2 months前审核

nice

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