Insert only 1 data into a cell using linq.

How i can insert only 1 record into a cell. using Linq. I am using EF6
I want to insert "Y" or "N"   into a cell to check whether user is Active or not, using linq. I want to insert into "USER" table, which have all the user detail including "IsActive" field. Without retrieving all the user details i just want to insert "Y" or "N" into the "USER" table.