Update a single row with t-sql

Question

I want to update a row in my date base. The problem is, through a mistake on my part, I have two identical rows of data. How do I run the update on just one row?

Answer 1

Use SET ROWCOUNT;

SET ROWCOUNT 1; UPDATE Production.ProductInventory SET Quantity = 400 WHERE Quantity < 300; GO

http://msdn.microsoft.com/en-us/library/ms188774.aspx