Suppose that a website contains two tables, theCustomerstable and theOrderstable. Write a SQL query to find all customers who never order anything.Tab...
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数据库 时间：
2015-07-27 12:48:29
阅读次数：
249
Description ：Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to vi...
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其他好文 时间：
2015-07-26 18:54:01
阅读次数：
126
Description ：BackgroundHugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who t...
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其他好文 时间：
2015-07-26 18:49:53
阅读次数：
131
Who Gets the Most Candies?
Time Limit: 5000MS
Memory Limit: 131072K
Total Submissions: 11597
Accepted: 3616
Case Time Limit: 2000MS
Description
N children are si...
分类：
编程语言 时间：
2015-07-26 11:11:50
阅读次数：
159
DescriptionSunnyPig is a pig who is much cleverer than any other pigs in the pigpen. One sunny morning, SunnyPig wants to go out of the pigpen to date...
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其他好文 时间：
2015-07-26 00:25:00
阅读次数：
108
poj 1797 Heavy TransportationDescription
Background
Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever man who tells him whether the...
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其他好文 时间：
2015-07-25 16:57:11
阅读次数：
160
poj 2253 FroggerDescription
Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to visit her, but since the water is dir...
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其他好文 时间：
2015-07-25 15:17:16
阅读次数：
138
问题描述：
Cygwin好不容易安装好了ssh服务,第一连接没有问题，可以显示相关信息
$ ssh localhost
Last login: Sat Jul 25 09:00:30 2015 from ::1
Administrator@LYX ~
$ who
Administrator pty1 2015-07-25 09:03 (::1)
后来再...
Treasure Hunt I
Time Limit: 2 Seconds Memory Limit: 65536 KB
Akiba is a dangerous country since a bloodsucker living there. Sometimes the bloodsucker will appear and kill everyone who isn...
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其他好文 时间：
2015-07-25 07:12:36
阅读次数：
109
一.类的定义--class关键字类的组成包括成员变量(name,age)和成员函数(who)classUser:
name=‘zhzhgo‘
age=25
defwho(self):
print"I‘m"+self.name对象的创建u=User()
u.age
u.who()构造方法和析构方法__init__()对象生成的时候执行构造方法__def__()对象销毁的时候执行析构方法..
分类：
编程语言 时间：
2015-07-23 00:51:09
阅读次数：
158
