Top 5 Databases for Web Developers

本文概述了适合Web开发者的五大数据库,包括MySQL、Microsoft Access、Microsoft SQL Server Express、Oracle Express Edition 和 DB2 Express-C。文章详细介绍了每个数据库的特点、成本、用户界面和帮助资源,并提供了下载和入门指南。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

Top 5 Databases for Web Developers

Introduction

When listening to developers talk about databases you will usually hear buzz words like robust, scalable, efficient, etc. Discussions will focus on the power of the DBMS (DataBase Management System) and how it integrates with other technologies. In our case, however, we don’t really care about most of those things. Instead we are going to be looking at the cost of getting started, tools, the user interface and availability of help, especially help for the beginner.

In the list below we’ll talk briefly about each DBMS, give you some pros and cons, and show you how to download and get started with each of them.

MySQL Community Server

This DBMS gets the number one nod mainly because the community version is free and is a great platform to begin learning on. There are, of course, commercial versions of MySQL for sale once you get to the point where you are developing large scale commercial applications, but getting started will cost you a big fat nothing.

Initially MySQL was available on a small set of platforms, Linux for the most part. However, now you can put MySQL on pretty much anything that you can imagine including Linux, Mac and Windows.

There is also a community version of their MySQL Workbench tool which gives the beginner a nice GUI (graphical user interface) to visually design and work with database tables. MySQL Workbench is reasonably intuitive, helps the beginner learn syntax by allowing the user to see syntax created by the tool when a task is designed, and has decent help documentation. Better than the actual help documentation you can find a ton of online tutorials, blogs, articles, etc. on developing in MySQL.

To get started with MySQL download both the MySQL Community Server and MySQL Workbench tool.

Microsoft Access

Unlike MySQL, Microsoft’s Access is not free. However, as it is part of Microsoft Office, many developers already have it. Even if you don’t use Microsoft Office you can still download a trial version of Access which will get you 60 days to play around with it and see if it is for you.

Access does have some key similarities to MySQL. It lets you design a table or task visually and then see the syntax that gets created. There are also some good and not so good differences. On the good side Access doesn’t have two separate installations (one for the DBMS and one for the design tool) but rather all comes as a single application. On the down side, Access has some significant limitations. It’s not nearly as flexible on which operating systems it can be installed on. More significantly, it has a serious limitation in how many concurrent connections it can handle before performance degrades. What that means is that Access is ideal for learning and for low traffic hobbyist websites but becomes sluggish and unsuitable for websites that have moderate or heavier traffic.

If you don’t already have Microsoft Office you can download the trial.

Microsoft SQL Server Express

With this DBMS and the next two, we step up to the big boys. Microsoft SQL Server, Oracle and DB2 are the most popular of the major DBMS’s.  They each have separate design tools and server applications that must be installed.

In truth, Microsoft SQL Server, Oracle Express and DB2 Express are all very similar in tools and functionality. Their biggest differences lie in the syntax of their SQL, therefore, they are not really listed in any particular order. The Microsoft SQL Server option does have one drawback in that the operating systems it will run on are limited.

You can download Microsoft SQL Server Express for free.

Oracle Express Edition

Oracle Express also has tools and a separate server application. It also has more operating system options than Microsoft SQL Server Express. The download options are also much more abundant than the others in this list. But all the download info you really need to get started can be found here.

DB2 Express-C

The install options and supported OSes of DB2 Express-C are very similar to those of Oracle Express. Online tutorials, articles and examples, however, are not as abundant as the other options in this list but are still more than adequate. You can also download DB2 Express-C to get started.

So, Which One Do I Choose?

When deciding where to start I suggest you go through a simple series of common sense questions:

  1. Are you learning SQL for work?

    If you are learning SQL for work, for example, you will be best served selecting the same DBMS that you use at work. By selecting the same DBMS that you use at work you will save yourself much pain and suffering with SQL syntax confusion when you start doing actual development.

  2. Are you learning SQL with or for a web development technology like PHP or ASP.NET?

    If you are learning SQL to use with a web development technology then you will find that your life will be much easier if you select a DBMS that is either created by or made to work with your web technology of choice. For example, ASP.NET developers will usually select Microsoft SQL Server or Microsoft Access, PHP developers will usually choose MySQL or Oracle, and Java/WebSphere developers will usually select DB2.

  3. Are you learning just to expand your brain?

    If none of the questions above really apply to you I would suggest you choose either MySQL or Microsoft Access as they have good user interfaces and great online content.

Conclusion

Getting started with database development is not nearly as hard as it used to be. As you can see above, all major DBMS producers offer a free version of their enterprise products. That means the cost to get started is pretty much whatever it is going to cost you for some books. You could even avoid that cost by surfing through the tons of tutorials, examples and references available on the internet.


this file is from: http://www.htmlgoodies.com/primers/database/top-5-databases-for-web-developers.html


资源下载链接为: https://pan.quark.cn/s/140386800631 通用大模型文本分类实践的基本原理是,借助大模型自身较强的理解和推理能力,在使用时需在prompt中明确分类任务目标,并详细解释每个类目概念,尤其要突出类目间的差别。 结合in-context learning思想,有效的prompt应包含分类任务介绍及细节、类目概念解释、每个类目对应的例子和待分类文本。但实际应用中,类目和样本较多易导致prompt过长,影响大模型推理效果,因此可先通过向量检索缩小范围,再由大模型做最终决策。 具体方案为:离线时提前配置好每个类目的概念及对应样本;在线时先对给定query进行向量召回,再将召回结果交给大模型决策。 该方法不更新任何模型参数,直接使用开源模型参数。其架构参考GPT-RE并结合相关实践改写,加入上下文学习以提高准确度,还使用BGE作为向量模型,K-BERT提取文本关键词,拼接召回的相似例子作为上下文输入大模型。 代码实现上,大模型用Qwen2-7B-Instruct,Embedding采用bge-base-zh-v1.5,向量库选择milvus。分类主函数的作用是在向量库中召回相似案例,拼接prompt后输入大模型。 结果方面,使用ICL时accuracy达0.94,比bert文本分类的0.98低0.04,错误类别6个,处理时添加“家居”类别,影响不大;不使用ICL时accuracy为0.88,错误58项,可能与未修改prompt有关。 优点是无需训练即可有较好结果,例子优质、类目界限清晰时效果更佳,适合围绕通用大模型api打造工具;缺点是上限不高,仅针对一个分类任务部署大模型不划算,推理速度慢,icl的token使用多,用收费api会有额外开销。 后续可优化的点是利用key-bert提取的关键词,因为核心词语有时比语意更重要。 参考资料包括
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值