How come Merge always Insert new row at the bottom?

Question

Hi, 
I came across an issue when I was using Merge to update a table A in my database. I used a stored procedure which takes a table variable, say B, as a parameter. A and B has the same structure. I would like A always to be updated with B. Merge seems to be
a perfect choice to do this task. 
I created a datatable in code, and passed this datatable to the stored procedure. It works well. However, any rows in B that don't exist in A are always inserted at the bottom of table A. How can I possibly let the new row be inserted into the middle of
the table?

Answer 1

How can I update A to be exactly like B? If I use Merge to do insertion, I get
Table A:
Tom 23 Male
Jerry 20 Male
Linda 39 Female
Sam 30 Male
Yes, this is exactly the same as Table B. Tables are sets, that they are unordered objects. If you want to see data, you need to apply an ORDER BY clause.
Erland Sommarskog, SQL Server MVP, [email protected]