如何学习 SQL 语言？ - 知乎 经典SQL练习题 - CSDN博客 sql练习网站 - CSDN博客 MySQL SQL常用语句自我测试练习-苦逼程序员-迈进-51CTO博客 将MySQL安装到D盘 – 程泽群的博客 MySQL Commands sql 练习(五) - 简书 经典SQL练习题 查询Score表中的最高分的学生学号和课程号。（子查询或者排序） SELECT sno,cno FROM score WHERE degree =(SELECT MAX(degree) FROM score) select sno, cno from score order by degree desc limit 1,1; 查询Score表中至少有5名学生选修的并以3开头的课程的平均分数。 SELECT AVG(degree),cno FROM score WHERE cno LIKE '3%' GROUP BY [...]
Easy Difficulty Combine Two Tables - LeetCode SELECT FirstName, LastName, City, State FROM Person LEFT JOIN Address ON Person.PersonId = Address.PersonId; Second Highest Salary - LeetCode SELECT distinct(Salary) AS SecondHighestSalary FROM Employee UNION SELECT NULL ORDER BY SecondHighestSalary DESC LIMIT 1, 1; Employee Earning More Than Their Managers Assign two different names for single table and [...]
Data Model Basic Data Operations: selection, projection, union and join Sturctre Person{ firstName: string, lastName: string, DOB: date } Relational Data Model Represented as Table; relational tuple as row in the table Atomic: represent one unit of information and cannot be degraded further Header tells the constaints: ID: Int Primary Key | Fname: string Not null [...]
Just received a Python coding challenge and I believe it would be useful to share.
最近暑假没有回国，忙着做RA+找实习，RA的工资其实已经很慷慨了，加上暑假每周都能工作40h，但是考虑到未来的求职，心里还是很慌，赶着实习招聘的尾声继续坚持投简历。
Simon received the board game Ticket to Ride as a birthday present. After playing it with his friends, he decides to come up with a strategy for the game.
Here is a complete version of Python2.7 code regarding the problematic original version. Just paste in in any .py file and run.
个人认为可变对象和深浅拷贝是未来编程首要注意的事情，毕竟如果是这个上面出现bug应该比较难察觉。
编写程序，提示输入大于2的整数（检查），然后反复求该数字的平方根直到小于2，显示每次得到的平方根与已经完成的操作次数，输出时采用3位小数的格式
