update dbo.testTable set
fname = (select fname from dbo.testTable where pkid = 2)
where
pkid = 1;
Thanks Lynne!
if there were multiple columns would I just do the same for each column, ie:
update dbo.testTable set
fname = (select fname from dbo.testTable where pkid = 2),
lname = (select fname from dbo.testTable where pkid = 2),
address = (select address from dbo.testTable where pkid = 2
where
pkid = 1;