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计算数据库中30天以内,30-60天,60-90天,90天以外的数据的个数(用sql实现)
30天以内:select count(*) from TB where datediff(day,字段名,getdate()) between 0 and 3030-60天:select count(*) from TB where datediff(day,字段名,getdate()) betwe...
分类:数据库   时间:2015-04-07 13:38:56    阅读次数:412
How to effectively work with multiple files in Vim?
Why not use tabs (introduced in Vim 7)? You can switch between tabs with :tabn and :tabp, With :tabe you can add a new tab; and with a regular :q or ....
分类:系统相关   时间:2015-04-07 11:40:39    阅读次数:153
并查集 POJ 1988
#include #define N 30010int pa[N]; //parentint siz_tree[N]; //size of treeint d[N]; //dist between node and rootint Find(int x){ if(pa[x] == x) ret...
分类:其他好文   时间:2015-04-06 00:45:06    阅读次数:306
Android LinearLayout Why Gravity Not Work
Some Android Developer may not know well of Linearlayout . This may help you to know sth about the gravity of its chilren; -------------------CONET ------------------ 1) wahts the diffrence between...
分类:移动开发   时间:2015-04-04 18:33:26    阅读次数:169
UVA - 1589 Xiangqi (模拟)
Xiangqi Problem Description Xiangqi is one of the most popular two-player board games in China. The game represents a battle between two armies with the goal of capturing the enemy’s “genera...
分类:其他好文   时间:2015-04-04 09:11:41    阅读次数:191
HDU 2784 Connections between cities 并查集+Online_LCA
模板攒起来#include #include #include #include #include #include #include #pragma comment(linker, "/STACK:1024000000"); #define LL long long int using namespace std; const int MAXN = 10010; const ...
分类:其他好文   时间:2015-04-03 21:07:15    阅读次数:180
HDU 2874 Connections between cities (离线LCA)
题目地址:HDU 2874 好坑的一道题。。MLE了好长时间、。、。全用了前向星而且把G++改成了C++才过了。。 LCA裸题,没什么好说的。。 代码如下;#include #include #include #include #include #include #inc...
分类:其他好文   时间:2015-04-03 21:07:08    阅读次数:164
mysql 比较函数和操作符
MYSQL之中的比较函数和操作符:1、[NOT] BETWEEN...AND...Checkwhetheravalueiswithinarangeofvalues说明:expr between min and max 如果expr大于或等于表达式是否小于或等于最大和最小之间,返回1,否则返回0。 ....
分类:数据库   时间:2015-04-03 15:06:46    阅读次数:184
Digiprog 3 and Digimaster 3 odometer correction Table comparison
Digimaster 3 and DigiProg 3 both are branded and respected odometer correction tools on the aftermarket. What’s the difference between these two km ch...
分类:其他好文   时间:2015-04-03 13:08:12    阅读次数:144
SQL Server如何进行时间比较的代码
例子: datediff(dd,add_time,getdate()) not between 0 and 7select count(*) from table where DATEDIFF ([second], '2004-09-18 00:00:18', '2004-09-18 00:00:1...
分类:数据库   时间:2015-04-02 22:36:09    阅读次数:179
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