A long-distance telephone company charges its customers by the following rules:Making a long-distance call costs a certain amount per minute, dependin...
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其他好文 时间：
2015-02-11 12:16:42
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172
1016. Phone Bills (25)时间限制400 ms内存限制65536 kB代码长度限制16000 B判题程序Standard作者CHEN, YueA long-distance telephone company charges its customers by the followi...
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其他好文 时间：
2015-02-08 19:23:47
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120
10.6 - Apple and our customers place a high value on simple, refined, creative, well thought through interfaces. They
take more work but are worth it. Apple sets a high bar. If your user interface i...
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2015-02-05 11:17:58
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Shoemaker's Problem
Shoemaker has N jobs (orders from customers) which he must make. Shoemaker can work on only one job in each day. For each ithjob, it is known the integer Ti (1i<=1000), th...
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其他好文 时间：
2015-02-05 11:15:24
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题目描述： 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. Table: Customers. +----+-------+
|...
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其他好文 时间：
2015-02-04 00:54:11
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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.
Table: Customers.
+----+-------+
| Id | Na...
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数据库 时间：
2015-02-01 23:24:12
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436
添加： 1 using (var edm = new NorthwindEntities()) 2 3 { 4 5 Customers c = new Customers { CustomerID = "c#", City = "成都市", Address = "中国四川省", CompanyN.....
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数据库 时间：
2015-01-31 12:01:49
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286
首先看看表结构！
customer表:
create table customers
(
ID bigint not null primary key auto_increment,
userName varchar(20)
);
Order表:
create table orders
(
ID bigint not null prim...
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Web程序 时间：
2015-01-19 17:18:11
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597
c2c实际是电子商务的专业用语，是个人与个人之间的电子商务。比如一个消费者有一台电脑，通过网络进行交易，把它出售给另外一个消费者，此种交易类型就称为C2C电子商务。淘宝是属于C2C模式的。c2b是电子商务模式的一种，即消费者对企业（customers to business）。真正的C2B 应该先有...
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其他好文 时间：
2015-01-15 12:22:48
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195
selectcust_name,cust_state,(selectcount(*)fromorderswhereorders.cust_id=customers.cust_id)asordersfromcustomersorderbycust_name;开始执行，找出customers的第一条记录，然后在执行子查询，这个时候customers.cust_id就是一个值，将子查询全部执行完后，在执行外部查询..
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数据库 时间：
2015-01-14 18:16:22
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147
