Need a SP to read Table A and update Table B

Hi

I need a SP to read table A (1000 records) and updates Table B. I think I have to use Cursor, but I'm not very good at writing SP. Any help would be appreciated. Thanks.You need to help us a little bit. What, if any relationship exists between Table A and B? Is there a column in each that links one to the other?|||The two tables (A and B) are identical and both have a primary key. What I need to do is to update all rows in Table B with the new one from Table A. This is like a batch update from A to B.