Correctly install the SQL server database and SQL server database

Correctly install the SQL server database and SQL server database
-IIS function requirements (warning)
Message
IIS functional requirements
Microsoft Internet Information Service (IIS) is not installed or disabled. Some SQL Server functions require IIS. If IIS is missing, some SQL Server functions cannot be installed. To install all SQL Server Functions, install IIS or enable the IIS service (if this service is already installed) through "Add/delete programs" in the control panel ), then run the SQL Server Installation program again. For a list of features that depend on IIS, see "functions supported by SQL Server versions" in books online ".
On the Control Panel, click "enable or disable Windows", select "Internet Information Service", and click "OK" to complete the installation. However, the IIS function requirements (warning) still appear ), why? Is it because the service has not been started and check whether the service has been started, that is, the components should not have all the functions installed, and the following components need to be installed on the Internet:

Common HTTP functions of static content

Common HTTP functions of default documents

Common HTTP functions of HTTP redirection

Common HTTP features of directory browsing

ASP. NET application development

ISAPI Extended Application Development

ISAPI filter application development

Windows authentication security

IIS configuration database management tool

IIS 6 WMI management tool

After selecting these components, you can install them correctly!