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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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统计 C 语言源程序里标识符的个数及相应标识符出现次数的程序...
统计 C 语言源程序里标识符的个数及相应标识符出现次数的程序-statistics Lane C language source identifier number and the corresponding frequency identifier procedures
- 2022-02-24 18:03:49下载
- 积分：1
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地图图幅名计算函数库，主要支持新国标10位码
地图图幅名计算函数库，主要支持新国标10位码-Map of the calculation is based library map sheet, mainly to support the new national standard 10 yards
- 2022-07-03 23:18:12下载
- 积分：1
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软件简介：新专辑的单
软件介绍：新天堂单用户相册之巴巴变 v1.0 Alpha新巴变相册系统是一套使用PERL写的单用户相册，使用了稀饭相册系统的模板，有良好的显示效果。它基于巴巴变开放的API接口，所有的图片和数据都存放在巴巴变的服务器上，因而对于你的服务器而言不需要什么的存储空间，也不需要有大的带宽，最大限度的降低了安装和运行成本。免去了换空间时的数据转存的问题,你要做的就是把文件从这台服务器拷贝到另一台服务器，而这一切不过分分钟就解决。-Software Description: The new album of the single-user heaven Bababian v1.0 Alpha Bus Change album System is a single-user to use PERL to write albums, using the template system, rice porridge album, there is a good display. It is based on an open API interface Baba change all the pictures and data are stored in the Baba changing servers, so no need for you in terms of what the server storage space and does not require large bandwidth, the maximum reduced installation and operation costs. Eliminates the need for space maintained by the data transfer problem, you have to do is to copy the file from server to another server, and all this, but for every minute to resolve.
- 2022-11-11 15:55:03下载
- 积分：1
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图像浏览器
图像浏览器-image browser
- 2022-01-22 11:46:16下载
- 积分：1
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温度测量程序
本程序用mivro controlle avr写C来测量温度。本程序检查它是否正确运行并使用它。本程序为研究和键盘读取器及步进电机编写；
- 2022-01-25 16:30:46下载
- 积分：1
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Capacitance introduced the article, when you choose what kind of capacitor to wo...
介绍电容的 文章， 当你为选什么样的电容发愁时， 就看看它-Capacitance introduced the article, when you choose what kind of capacitor to worry about when to see it
- 2023-04-02 16:10:04下载
- 积分：1
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一个用数学的方法所描述的游戏:哈利魔法.只要根据游戏中的说明即可,它可利用算法来猜出你心中的数学....
一个用数学的方法所描述的游戏:哈利魔法.只要根据游戏中的说明即可,它可利用算法来猜出你心中的数学.-a mathematical description of the methodology of the game : Harry magic. As long as the game according to the statement can be, it can use algorithms to guess the math in your heart.
- 2022-03-01 02:53:21下载
- 积分：1
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读入一个值n表示棋盘的大小，然后求出n*n格棋盘上放n皇后棋且不会相互吃掉对方的所有解答...
读入一个值n表示棋盘的大小，然后求出n*n格棋盘上放n皇后棋且不会相互吃掉对方的所有解答-Reading into a value of n, said the size of the chessboard, and then calculated n* n chessboard grid put n Queen s chess and will not eat each other all the answers
- 2022-01-28 19:03:50下载
- 积分：1
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Hypertext makup language example.
Hypertext makup language example.
- 2022-08-25 19:44:24下载
- 积分：1
