Installation tutorial:
/info/2007/10/info-16479.html SQL Server 2005 Express is a free version provided by Microsoft, but the database file has a maximum limit of 4G and some functional restrictions. It is mainly suitable for users with a small amount of data. Of course, you can also install MSDE 2000/2005 Express first for DB Mail Pro software trial, and then upgrade to SQL Server 2005 Standard Edition or Enterprise Edition later.
Microsoft SQL Server 2005 Express Edition (SQL Server Express) is a free, easy-to-use, lightweight version of SQL Server 2005 that is fast and easy to learn for rapid development and deployment of dynamic data-driven applications. SQL Server Express Provides powerful and reliable data management tools that are feature-rich to help protect data and improve performance. It is suitable for embedded application clients, lightweight Web applications, and local data stores. SQL Server Express features easy deployment and With the features of rapid prototyping, you can obtain it for free and redistribute it with the application for free. If you need more advanced database functions, you can seamlessly upgrade SQL Server Express to a more complex SQL Server version.