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Copy from one table to another table???

Posted By:      Posted Date: September 28, 2010    Points: 0   Category :ASP.Net


   i have 2 table   tab1 and tab2.

tab1 has id,fname1.   here id is primary key.

tab2 has id,fname2.    here id is primary key.

i run this 

insert into tab1(id,fname)select id,fname2 from tab2

and i am able to copy from tab2 to tab1.

now i have some changes in tab2 and few more rows are added in tab2.

So i have to update tab1 table with new rows and update the old ones.

How to write query for this?

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