Adding a new instance of the MS SQL EXPRESS
How do I add another instance of MS SQL Express
Run the file from the installation version of MSSQL
To install a new instance of MSSQL database server, select option
New installation or add features to an existing installation.
Select the options - new installation or add shared features.
We accept licenses from Microsoft
We reaffirm the selected items to be installed - the default option
We create a new instance of the move to Named instance and enter the name here that will be displayed.
Click Next to create the instance
We reaffirm account settings SQL
Select the options Mixed Mode (SQL Server authentication and Windows authentication)
Set the path to the folder or leave them standard.
Uncheck or report errors
We finish adding instance - successfully