Navigate this link to download SQL SERVER:
https://www.microsoft.com/en-pk/download/details.aspx?id=42299
Click on Download:
Choose the selected one file option to download it.
Once downloaded, go to Downloads and double click on it to start installing it.
Click Ok
Click on first option.
Click on I accept the license terms checkbox and press Next
Press Next & proceed
Press Next & proceed
Click on Default Instance & press Next.
Press Next
Choose 1) Mixed Mode 2) Enter & Confirm Password 123456 & Press Next.
Press Next and it will be installed.
TO CONFIGURE SQL SERVER 2014 EXPRESS
Search in search bar SQL Configuration and Run it as Administrator.
Then double click on SQL Server Network Configuration.
Now click on Protocols of MSSQLSERVER, Right click on TCP/IP, enable it & press Ok OR Yes.
Now click on SQL Server Services & right click on MSSQLSERVER Service & restart it.
No close this software & search Windows Defender Firewall & open it.
Then Click Advanced Settings.
Then go to Inbound Rules.
Now create New Rule.
Now select Port option & press Next.
Now write 1433 & press next
Press Next again
Press Next & proceed.
Now write sql & press Finish.
And with this SQL Installation & Configuration is done.