-
您可能已经设计了数据库，以及表
或许大家都设计过数据库,也为表定义过主键,今天我想阐述的是,应该如何正确的设计一个主键,在以往的一些资料中,都没有提及到主键设计的原则.我为此总结了一下:
-you might have designed the database, as well as table-defined primary key, and today I would like to explain is that How should correct the design of a primary key, in the past some of the information. no mention of the primary key design principle. I summarize this for a moment :
- 2023-04-05 12:15:04下载
- 积分：1
-
我自己做得小游戏
我自己做得小游戏-doing my own small game
- 2022-01-28 01:50:54下载
- 积分：1
-
facebox效应，可以用来参考。..。
FaceBox 效果，可以用来参考-FaceBox effects, can be used to refer to. . . .
- 2022-08-16 07:16:07下载
- 积分：1
-
Nobel Prize Winner's Paper
Nobel Prize Winner s Paper-Nobel Prize Winner"s Paper
- 2023-03-06 19:40:03下载
- 积分：1
-
次为用户信息的加密程序，以免用户的权益不受侵害。
次为用户信息的加密程序，以免用户的权益不受侵害。-time information for users of encryption to prevent users from encroachment.
- 2022-06-20 10:53:12下载
- 积分：1
-
teach yourself C++ in 21 days
第五版
teach yourself C++ in 21 days
第五版-teach yourself C in the fifth edition of 21 days
- 2022-03-14 18:31:54下载
- 积分：1
-
随着我国经济的快速发展，对石油的需求与日俱增。这对石油行业来说，既是机遇更是挑战。它要求石油人具备更强的专业知识和能力。因此它对石油专业的大学生提出了更高的要求...
随着我国经济的快速发展，对石油的需求与日俱增。这对石油行业来说，既是机遇更是挑战。它要求石油人具备更强的专业知识和能力。因此它对石油专业的大学生提出了更高的要求。本次课程设计就是为了适应上述要求而开设的。它要求学生在熟练掌握理论知识的基础上，结合生产实践，自己独立完成一口井的采油设计。- Along with the our country economy fast development, grows day
by day to the petroleum demand. This said to the petroleum profession
that, since the opportunity is the challenge. It requests the
petroleum person to have the stronger specialized knowledge and the
ability. Therefore it set a higher request to the petroleum
specialized university student. This curriculum designs is for adapt
the above request to open. It requests the student skilled to grasp
the theory knowledge in the foundation, in coor with progress of
production practice, own independently complete a well the extraction
design.
- 2022-07-18 22:34:01下载
- 积分：1
-
FPGA
基于FPGA的DDS算法的实现，已经通过FPGA的后端仿真实现-FPGA-based algorithm cordic, has passed the back-end FPGA simulation
- 2022-03-25 06:45:04下载
- 积分：1
-
电子皮带秤数据采集工具，可以广泛和码头，电厂等拉姆齐仪表直接连接...
电子皮带秤数据采集工具，可以广泛和码头，电厂等拉姆齐仪表直接连接
- 2022-01-22 13:24:01下载
- 积分：1
-
ROBODoc通过提取源码中的特定格式的注释块（specially formatted headers）并形成文档文件，文档文件的格式包括HTML, ASCII...
ROBODoc通过提取源码中的特定格式的注释块（specially formatted headers）并形成文档文件，文档文件的格式包括HTML, ASCII, XML DocBook, LaTeX或RTF 还能间接形成PDF 和HTML Help文档-ROBODoc By extracting the source code of the specific format of the comment block (specially formatted headers) and the formation of the document file, document file formats, including HTML, ASCII, XML DocBook, LaTeX, or RTF also an indirect form PDF and HTML Help documentation
- 2022-03-18 10:42:30下载
- 积分：1
