update t2
set  CL_ID_2= t1.CL_ID
FROM [A_PLUS].[dbo].clients as t1
inner join  [MT-SERVER-PC,1433].[A_PLUS].[dbo].clients as t2
on t1.[CL_IDENT]  =t2.[CL_IDENT] and t1.[CL_FIZIK]  =t2.[CL_FIZIK]