摘要：
Table holds the x coordinate of some points on x axis in a plane, which are all integers. Write a query to find the shortest distance between two poin 阅读全文
posted @ 2019-01-07 17:50
Angel_Kitty
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There is a robot starting at position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this robot ends up at (0, 0) after it 阅读全文
posted @ 2019-01-07 17:39
Angel_Kitty
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There is a table 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 solution t 阅读全文
posted @ 2019-01-07 17:28
Angel_Kitty
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