This is a simple experimental web page for asp to connect to a SQL database. It is only for everyone to learn and observe. The key is to learn the background data management page. Learn another use of the combo box control on this page. Please configure SQL and IIS services. Due to the different versions of SQL Server, I did not attach the SQL database. Please restore the database according to the ASP source code before it can be used. In this ASP source code, you will learn how to add, delete, and modify data from ASP web pages to SQL for further in-depth learning.