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Show intermediate steps to get your final answers, if applied. Problem 1. (Basic Database Concepts) (15 Points) Consider the following relation INVOICE: Order ID Order

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Show intermediate steps to get your final answers, if applied. Problem 1. (Basic Database Concepts) (15 Points) Consider the following relation INVOICE: Order ID Order Date Customer ID Customer Name Product ID Unit Price Ordered Quantity (IA). Identify what you think should be various candidate keys, and write up your own words the conditions or assumptions under which each candidate key would be valid. (I.B). Please specify the primary key

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