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2014/11/24 条件查询
一、多个条件查询:in、between select * from category where parent='013' or parent='12' or parent='011'等于select * from category where parent in ('011',''012','01...
分类:其他好文   时间:2014-11-24 15:11:17    阅读次数:185
输入输出
puts("Please input a number between 1 and 100: "); scanf("%d",&Number); printf("Your input number is %d\n",Number); ...
分类:其他好文   时间:2014-11-23 18:50:55    阅读次数:147
Clock Angle
ProblemWe are given a specific time(like 02:23), we need to get the angle between hour and minute(less than 180)Solution 1 public static double clockA...
分类:其他好文   时间:2014-11-21 10:36:27    阅读次数:211
sas宏(2),运行中创建宏与使用宏,proc sql创建宏, scl中宏处理(暂缺)
1:在程序运行中进行宏定义CALL routines that enable you to transfer information between an executing DATA step and the macro processor.You can use the SYMPUT routi...
分类:数据库   时间:2014-11-20 13:37:57    阅读次数:405
九度 题目1154:Jungle Roads
题目描述:         The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads between villages some years ago. But the jungle overtake...
分类:其他好文   时间:2014-11-20 09:08:21    阅读次数:364
数据库操作--查询(续)
1、常用的查询条件: (1)比较 =,>,=,(不等于),!>(不大于),! (2)确定范围 between and , not between and (3)确定集合 in , not in (4)字符匹配 like , not like (5)空值 is null , is not null (6)多重条件(逻辑运算)and , or , not 2、聚集函数 count([d...
分类:数据库   时间:2014-11-19 22:17:48    阅读次数:159
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.4.4
(1). There is a natural isomorphism between the spaces $\scrH\otimes \scrH^*$ and $\scrL(\scrH,\scrK)$ in which the elementary tensor $k\otimes h^*$co...
分类:其他好文   时间:2014-11-19 18:05:06    阅读次数:326
what is the difference between static and normal variables in c++
void func(){ static int static_var=1; int non_static_var=1; static_var++; non_static_var++; cout<<"Static="<<static_var; cout<<"NonS...
分类:编程语言   时间:2014-11-18 15:55:47    阅读次数:130
sql中优化查询
1、在大部分情况下,where条件语句中包含or、not,SQL将不使用索引;可以用in代替or,用比较运算符!=代替not。2、在没有必要显示不重复运行时,不使用distinct关键字,避免增加处理时间。3、当使用and运算符查找某个范围内的数据时,一般不使用索引,可以用between代替。总之,...
分类:数据库   时间:2014-11-18 13:22:04    阅读次数:158
Problem C: Celebrity Split
题目描述 Problem C: Celebrity Split Jack and Jill have decided to separate and divide their property equally. Each of their N mansions has a value between 1,000,000 and 40,000,000 dollars. J...
分类:其他好文   时间:2014-11-17 21:17:46    阅读次数:239
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