Is there a way to manage sql server express db, remotly, without installing a software.
As a portable apps or a web admin (like phpmyadmin)
There are a couple of web based tools, but last I looked at them they were pretty old and feature incomplete. You really should be using the SQL Server Management tool that comes with SQL Server. There is a downloadable version that can be installed, but you will need admin rights to install it on your machine.
There is no cost to installing SQL Server Management Studio on your computers, so there is no license to worry about purchasing.
I agree with the accepted answer there: LinqPad which is small and portable (you can use SQL instead LINQ, no worries).
I'm using SQL Database Studio. I have installed it on a machine with admin rights, then went to the Program Files/SQL Database Studio copied folder to the flash disk and it's working very well. The size of installed software is around 15MB I think.
use Database Browser Portable , you can download it at https://portableapps.com/apps/development/database_browser_portable