How to pass field or variable as a parameter in query string

@sachsoni .....could you please describe more about your requirement?

If you just need the internal name of the SharePoint column then:

• Go to list settings
• Click on the column whose internal name you want 
• When it opens in edit column format -- Grab the URL and internal name will be at the end
• Or else just right click and copy the link and paste it in notepad 

Hello kunal,

Thanks for reply, i have open another list form on save button click, along with i want to display my previous form data to new form. that's why i use query string method, but query string only works with static value and i want to put my column name here. but its not working correctly.

Do you have any idea how can i pass one form data to another form.