I have two tables in a SQL Server 2008 environment with the following structure
Table1 - ID - DescriptionID - Description Table2 - ID - Description <
Table1 - ID - DescriptionID - Description Table2 - ID - Description
Or you can simply update without using join like this:
Update t1 set t1.Description = t2.Description from @tbl2 t2,tbl1 t1 where t1.ID= t2.ID