There is no green arrow after sqlserver20 19 input.

Right-click the taskbar, select Start Task Manager, select the service bar, and click the service in the lower right corner to come out.

You can find all the services that mssql needs in this interface. The icon in the lower right corner of the desktop is sql2000, and the higher version has been deleted. Then find the management tool-service in the control panel, and then find the service of sqlserver, which can be closed and opened.

Sqlserver is actually a database, in fact, it can also be said to be a system. Before using some large-scale software, such as accounting software and programming software, sqlserver should be installed for important data backup. A computer with sqlserver installed at the same time can usually be used as a server. After IIS is installed, other computers can access it at any time.