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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
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Compare file
实现二个文件的比较功能.如b文件的每行在a文件中找到,则比较ok.否则比较fail.-Compare file
- 2022-03-12 01:03:22下载
- 积分:1
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牛顿
牛顿-拉夫逊法潮流计算程序-Newton- Raphson load flow calculation program
- 2022-04-09 06:56:59下载
- 积分:1
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这是一个采用JAVA做的聊天系统,没有用数据库,直接进行聊天...
这是一个采用JAVA做的聊天系统,没有用数据库,直接进行聊天-This is a use of JAVA to do the chat system, did not use the database directly to chat
- 2023-04-05 01:40:04下载
- 积分:1
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单片机ad转换c程序,含有protues仿真,所以需要安装peotues,以及keilc...
单片机ad转换c程序,含有protues仿真,所以需要安装peotues,以及keilc-C procedures for ad conversion single-chip, containing protues simulation, so it is necessary to install peotues, as well as keilc
- 2022-04-25 15:18:45下载
- 积分:1
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这UNIX C代码监视Web服务器每隔几分钟,试图找回我..
This Unix C code monitors a web server every few minutes by trying to retrieve its home page. It sends you email when it can t connect, and every so often while the server is still down. It sends a final message when it comes back up. If you have email paging, just direct the email to your pager address.-This Unix C code monitors a web server every few minutes by
trying to retrieve its home page. It sends you email when it can t
connect, and every so often while the server is still down. It sends a
final message when it comes back up. If you have email paging, just
direct the email to your pager address.
- 2022-08-18 21:02:42下载
- 积分:1
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The C++ Cookbook will make your path to mastery much shorter. This practical, pr...
The C++ Cookbook will make your path to mastery much shorter. This practical, problem-solving guide is ideal if you re an engineer, programmer, or researcher writing an application for one of the legions of platforms on which C++ runs. The algorithms provided in C++ Cookbook will jump-start your development by giving you some basic building blocks that you don t have to develop on your own.
- 2022-01-31 09:06:54下载
- 积分:1
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生生世世 生生世世 搜索
生生世世 生生世世 搜索-life and this life and this life and this life and this life Search
- 2023-02-09 04:20:04下载
- 积分:1
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婚纱摄影客户管理系统V2.0原型版
婚纱摄影客户管理系统V2.0原型版-wedding photography customer management system prototype version V2.0
- 2022-01-26 03:39:14下载
- 积分:1
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MSP430的SPI库
该库为德州仪器msp430系列单片机spi库。你可以用这个库处理spi通信。
- 2022-07-26 03:41:53下载
- 积分:1