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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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字符编码简介:ASCII,Unicode,UTF
字符编码简介:ASCII,Unicode,UTF-8,GB2312 -About character encoding: ASCII, Unicode, UTF-8, GB2312
- 2022-01-31 15:55:38下载
- 积分:1
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这是一ALTERA公司的培训内容,大家看看了,尤其参加SOPC竞赛的...
这是一ALTERA公司的培训内容,大家看看了,尤其参加SOPC竞赛的-Altera Corporation contents of the training, we look at, especially to participate in the contest SOPC
- 2022-02-26 13:26:44下载
- 积分:1
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mainboard BIOS upgrade tool, more suitable for the use of the old machines! Anot...
主板BIOS升级工具,适合较古老的机器使用!
另一版本8.26版-mainboard BIOS upgrade tool, more suitable for the use of the old machines! Another version of version 8.26
- 2022-08-13 09:07:29下载
- 积分:1
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支持J
支持J-LINK的sjf2410
J-LINK烧写NAND FLASH的工具-J-LINK support for the sjf2410J-LINK tool for NAND FLASH programmer
- 2022-03-21 15:38:19下载
- 积分:1
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Prepared using the VC queue in the order indicated and implementation of procedu...
使用VC编写的队列的顺序表示与实现程序,简单明了,方便易懂-Prepared using the VC queue in the order indicated and implementation of procedures, simple and clear, easy to understand
- 2022-06-27 05:59:46下载
- 积分:1
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本程序是一个简单的键盘控制程序响应的例程。
本程序是一个简单的键盘控制程序响应的例程。-This procedure is a simple keyboard control procedures in response to the routine.
- 2022-02-02 12:47:21下载
- 积分:1
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该算法设计短小精悍,很有参考价值,这是用VC++6.0编写的算法,希望大家可以参考...
该算法设计短小精悍,很有参考价值,这是用VC++6.0编写的算法,希望大家可以参考-the algorithm design small and great reference value, which is used to prepare the VC 6.0 algorithm, we can hope that the reference
- 2022-03-13 21:11:11下载
- 积分:1
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long time before the commencement of a time machine operation of the cpu
很久前作的一个启动机器时候的cpu运行情况-long time before the commencement of a time machine operation of the cpu
- 2022-03-20 00:46:29下载
- 积分:1
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Using Timers in MFC Applications在MFC应用程序中使用时间
Using Timers in MFC Applications在MFC应用程序中使用时间-Using Timers in MFC Applications in MFC applications using time
- 2022-08-19 08:24:45下载
- 积分:1