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摘要: 从集合(内存)中创建 RDD 从底层代码实现来讲,makeRDD 方法其实就是 parallelize 方法 val sparkConf = new SparkConf().setMaster("local[*]").setAppName("spark") val sparkContext = ne 阅读全文
posted @ 2022-01-09 19:41 Zhbeii 阅读(46) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/5a7975fabe1146329cee4f670c27ad55?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 SELECT last_name, first_name, 阅读全文
posted @ 2022-01-09 11:54 Zhbeii 阅读(84) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/c1472daba75d4635b7f8540b837cc719?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 题解来自:https://blog.nowcoder.net 阅读全文
posted @ 2022-01-09 11:29 Zhbeii 阅读(79) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/8d2c290cc4e24403b98ca82ce45d04db?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 SELECT s.emp_no,s.salary FROM 阅读全文
posted @ 2022-01-09 10:57 Zhbeii 阅读(39) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/a32669eb1d1740e785f105fa22741d5c?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 SELECT * FROM employees WHERE 阅读全文
posted @ 2022-01-09 10:22 Zhbeii 阅读(44) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/4a052e3e1df5435880d4353eb18a91c6?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 讲解: https://blog.nowcoder.net/ 阅读全文
posted @ 2022-01-09 10:12 Zhbeii 阅读(58) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/e50d92b8673a440ebdf3a517b5b37d62?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 SELECT de.emp_no, dm.emp_no AS 阅读全文
posted @ 2022-01-09 09:56 Zhbeii 阅读(34) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/ae51e6d057c94f6d891735a48d1c2397?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 select salary from salaries wh 阅读全文
posted @ 2022-01-08 20:41 Zhbeii 阅读(65) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/6d4a4cff1d58495182f536c548fee1ae?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 select a.emp_no,count(*) t fro 阅读全文
posted @ 2022-01-08 18:05 Zhbeii 阅读(51) 评论(0) 推荐(0)
摘要: https://www.nowcoder.com/practice/6d35b1cd593545ab985a68cd86f28671?tpId=82&tags=&title=&difficulty=0&judgeStatus=0&rp=1 select e.last_name,e.first_nam 阅读全文
posted @ 2022-01-08 17:18 Zhbeii 阅读(50) 评论(0) 推荐(0)
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