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def shopping_procedure(): milk_tea_no = input('请选择您要购买的奶茶编号：') goods_dic={} while True: if milk_tea_no not in goods_dic.keys(): if int(milk_tea_no) <= 阅读全文
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先贴一篇IBM沃森文本分析历届美国总统就职的演讲稿：http://36kr.com/p/5062661.html 2017年1月20日中午，唐纳德-特朗普在首都华盛顿宣誓就职，正式成为美国第45任总统。完成了从房地产老板直接到美国总统的华丽转身！今儿我们就对他的演讲稿进行文本分析，看看能不能翻出啥有 阅读全文
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Given a table salary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f values to m and vice ver 阅读全文
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X city opened a new cinema, many people would like to go to this cinema. The cinema also gives out a poster indicating the movies’ ratings and descrip 阅读全文
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There is a table courses with columns: student and class Please list out all classes which have more than or equal to 5 students. For example, the tab 阅读全文
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There is a table World A country is big if it has an area of bigger than 3 million square km or a population of more than 25 million. Write a SQL solu 阅读全文
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Question: Given a Weather table, write a SQL query to find all dates' Ids with higher temperature compared to its previous (yesterday's) dates. + + + 阅读全文
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Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never order anything 阅读全文
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Write a SQL query to find all duplicate emails in a table named Person. For example, your query should return the following for the above table: Selec 阅读全文
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The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id. + + + + + | 阅读全文