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SQL语言逻辑执行顺序
SQL语言逻辑执行顺序2012-12-18 16:18:13分类:数据库开发技术查询的逻辑执行顺序FROM ON JOIN WHERE GROUP BY WITH {cube | rollup}HAVING SELECTDISTINCTORDER BY 标准的SQL 的解析顺序为:.FROM 子.....
分类:数据库   时间:2014-05-29 05:12:06    阅读次数:404
R12 应用服务群
Oracle EBS R12 支持一些服务群,如下所示:Service Group Supports Root ServicesOracle Process Manager (OPMN) 进程管理器Web Entry Point ServicesWeb入口点服务HTTP ServerWeb...
分类:其他好文   时间:2014-05-29 04:25:23    阅读次数:306
IReport问题整理
1. 问题:IReport如何实现变量字段$F{ propertyName}赋值为一个NULL对象时不显示”null”, 而显示为空白?解决方法:选中动态单元格,右键选择属性,在弹出对话框TextField选项卡中选中Blank when null。思考:以往我们为IReport中变量字段赋值时会在...
分类:其他好文   时间:2014-05-29 00:04:49    阅读次数:383
关于眼睛的一切
Today’s program is all about eyes.When it comes to relationships, people’s eyes can be "a window into their hearts."This means that their eyes can tel...
分类:其他好文   时间:2014-05-28 23:52:27    阅读次数:392
sed use case: Filter without editing
if we want to filter with sed pattern and just print the filtered lines without any further editing , we can do it like thisls -a1 ~ | sed -ne "/^\./p...
分类:其他好文   时间:2014-05-28 22:58:56    阅读次数:294
对python生成器特性使用的好例子
1.对序列进行分组的函数(摘自web.py源码utils.py文件中) 1 def group(seq, size): 2 """ 3 Returns an iterator over a series of lists of length size from iterable. ...
分类:编程语言   时间:2014-05-28 04:21:00    阅读次数:365
primary and secondary crusher
Have we missed some critical information from this article? Are you a company, organisation or research group operating in this region and feel you wa...
分类:其他好文   时间:2014-05-28 04:06:31    阅读次数:337
sql去除重复语句
转自芙蓉清秀的BLOGhttp://blog.sina.com.cn/liurongxiu1211sql去除重复语句(2012-06-15 15:00:01)sql 单表/多表查询去除重复记录单表distinct多表group bygroup by 必须放在 order by 和 limit之前,不...
分类:数据库   时间:2014-05-28 04:00:47    阅读次数:280
[leetcode]Climbing Stairs @ Python
原题地址:https://oj.leetcode.com/problems/climbing-stairs/题意:You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either cl...
分类:编程语言   时间:2014-05-28 03:27:49    阅读次数:267
正则表达式/g/i/d
/g意思就是:global可选标志,带这个标志表示替换将针对行中每个匹配的串进行,否则则只替换行中第一个匹配串。如:we.fdffddfwe.加上/g后,则2个we都会出来;/i意思就是 case insensitive,区分大小写小字。如:sw与sW不管;/d意思是digital.是一个数字如:/...
分类:其他好文   时间:2014-05-27 16:57:49    阅读次数:234
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