-
一个用DELPHI编写的程序,很有个性.另有代码
一个用DELPHI编写的程序,很有个性.另有代码-a prepared using DELPHI procedures personality. Another source
- 2022-03-06 07:55:50下载
- 积分:1
-
用vb实现显示动画光标,一个经典例子极具参考价值
用vb实现显示动画光标,一个经典例子极具参考价值-used to achieve the cursor animation show, a classic example of great reference value
- 2022-05-20 08:18:40下载
- 积分:1
-
人们在使用SQL时往往会陷入一个误区,即太关注于所得的结果是否正确,而忽略了不同的实现方法之间可能存在的 性能差异,这种性能差异在大型的或是复杂的数据库环境中(...
人们在使用SQL时往往会陷入一个误区,即太关注于所得的结果是否正确,而忽略了不同的实现方法之间可能存在的 性能差异,这种性能差异在大型的或是复杂的数据库环境中(如联机事务处理OLTP或决策支持系统DSS)中表现得尤为明 显。笔者在工作实践中发现,不良的SQL往往来自于不恰当的索引设计、不充份的连接条件和不可优化的where子句。在对 它们进行适当的优化后,其运行速度有了明显地提高!下面我将从这三个方面分别进行总结:-people in the use of SQL often fall into the trap, that is too focused on the findings is correct, and ignore a different method may exist between the performance differences, these differences in large or complex database environment (such as online transaction processing or decision support OLTP system DSS) has become even more obvious. In practice I found that the poor tend to SQL from inappropriate design of the index, not fully connected and non-optimal conditions where the phrase. On their proper optimization, and their operating speed has been improved! Now I will be three aspects of this summary :
- 2022-07-14 22:31:11下载
- 积分:1
-
3D打印的程序
3D打印的程序3D打印的程序使用它可以看到看拉丝机林科大数据库锋利的顺口溜发动机上开发及第三方都设计费
- 2022-09-05 13:05:09下载
- 积分:1
-
一个可编辑的网格控件源码,已经编译通过!
一个可编辑的Grid控件源码,已经编译通过!-An editable Grid Control source, has been compiled through!
- 2022-01-21 17:28:12下载
- 积分:1
-
带有切分窗口的用户字典查找程序,有查找记录和分类的功能,学习vc++的非常好的代码,强烈推荐...
带有切分窗口的用户字典查找程序,有查找记录和分类的功能,学习vc++的非常好的代码,强烈推荐-splitting window with the user dictionary search procedures, and classification records search function, learning vc very good code, strongly recommended! !
- 2022-01-28 20:01:27下载
- 积分:1
-
VC6.0实现龙格库塔算法
这个是用VC6.0 来实现龙格库塔算法的源代码。欢迎大家下载、试用。谢谢大家的支持!希望能有帮助!
- 2022-08-20 21:59:39下载
- 积分:1
-
vc++编的,获取各种系统信息的源代码,希望有用
vc++编的,获取各种系统信息的源代码,希望有用-vc access to a variety of system information
- 2022-03-30 11:30:33下载
- 积分:1
-
GUI类库--ClassXP,该类库是用C++ + sdk写的代码,其结果体现的就是编译程序小巧、运行快速的特点...
GUI类库--ClassXP,该类库是用C++ + sdk写的代码,其结果体现的就是编译程序小巧、运行快速的特点-GUI class libraries-- ClassXP, is the Class C sdk writing code, and the results reflected in the translation program is small, fast running characteristics
- 2022-02-01 19:45:16下载
- 积分:1
-
一个关于动态图形的例子,图形有闪烁和变化功能
一个关于动态图形的例子,图形有闪烁和变化功能-on a dynamic graphic example of scintillation and graphics function changes
- 2022-08-13 09:24:28下载
- 积分:1