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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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Excel Functions
Visit the ProDiff microsite to download a fully functional copy of the software; ProDiff is a major redevelopment of PBDelta our leading Diff tool for PowerBuilder ... to suit you organizations standards such as the PBDR standards or the PFC.
- 2018-12-01 09:35:15下载
- 积分：1
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12864
这是我当时学习单片机液晶12864时的文档和程序源代码。(This is what I was learning when the MCU LCD 12864 documents and source code.)
- 2011-08-18 10:21:34下载
- 积分：1
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tree_height_cal
输入气象数据，根据ASRL模型计算森林区域最大树高(mapping maximum tree height with ASRL model)
- 2019-07-11 09:32:25下载
- 积分：1
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ProSAFE_Plus_Utility 2.7.7
说明： Netgear ProSafe plus utility v2.7.7
- 2020-01-28 03:10:35下载
- 积分：1
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vc并行接口通讯程序,
vc并行接口通讯程序,-vc parallel interface communication procedures,
- 2023-06-03 20:45:03下载
- 积分：1
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Nokia 7210 a number of code can be a very good understanding of the process of s...
一款诺基亚7210的 一些 代码 可以很好的了解起 应用过程和一些代码-Nokia 7210 a number of code can be a very good understanding of the process of starting the application and some code
- 2022-02-02 11:06:06下载
- 积分：1
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斯皮尔曼秩相关系数，可用于两对序列的相关统计分析，越大表示相关性越强。...
斯皮尔曼秩相关系数，可用于两对序列的相关统计分析，越大表示相关性越强。-Spearman s rank correalation coefficient
- 2022-08-09 07:49:42下载
- 积分：1
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check and alarm system
check and alarm system
- 2023-07-06 02:05:03下载
- 积分：1
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万年历c实现,简单使用
万年历c实现,简单使用-hefty almanac c realized, simple to use
- 2023-02-01 14:50:03下载
- 积分：1
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