FW: GUID Vs Int data type as primary key
Recently one of my friend ask me when I should go for GUID and When I should go for Int as primary key in table. So decided to write a blog post for it. Here are advantages and disadvantage of the GUID and INT.
INT Data Type:
Advantages:
- Its required small space in terms of the storage it will only allocates 4 bytes to store data.
- Insert and update performance will be faster then the GUID. It will increase the performance of the application.
- Easy to index and Join will give best performance with the integer.
- Easy to understand and remember
- Support of function that will give last value generated like Scope_Indentity()
Disadvantages:
- If you are going to merge table frequently then there may be a chance to duplicated primary key.
- Limited range of uniqueness if you are going to store lots of data then it may be chance to run out of storage for INT data type.
- Hard to work with distributed tables.
GUID Data Type:
Advantages:
- It is unique for the current domains. For primary key is uniquely identifies the table.
- Less chances of for duplication.
- Suitable for inserting and updating large amount of data.
- Easy for merging data across servers.
Disadvantages:
- Bigger storage size (16bytes) will occupy more disk size then integer.
- Hard to remember and lower performance with Join then integer.
- Don’t have function to get last uniquely generated primary key.
- A GUID primary Key will added to all the other indexes on tables. So it will decrease the performance.
Conclusion:
From above the advantages and disadvantages we can conclude that if you are having very large amount of data in table then go for the GUID as primary key in database. Otherwise INT will give best performance. Hope this will help you. Please post your comment as your opinion.
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】凌霞软件回馈社区,博客园 & 1Panel & Halo 联合会员上线
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步
· 现代计算机视觉入门之:什么是图片特征编码
· .NET 9 new features-C#13新的锁类型和语义
· Linux系统下SQL Server数据库镜像配置全流程详解
· 现代计算机视觉入门之:什么是视频
· 你所不知道的 C/C++ 宏知识
· 不到万不得已,千万不要去外包
· C# WebAPI 插件热插拔(持续更新中)
· 会议真的有必要吗?我们产品开发9年了,但从来没开过会
· 【译】我们最喜欢的2024年的 Visual Studio 新功能
· 如何打造一个高并发系统?