Update a table from another one

update dbo.ISSUE_BARCODES
set itm_code = t2.itm_code,im_code=t2.im_code,gross_wt=t2.obm_wght,net_wt=t2.obm_net_wt
from dbo.ISSUE_BARCODES t1 inner join temp_1 t2
on t1.barcode=t2.obm_brcd