Duplicate result

Question

I am writing a query in SQL server2005. This is returning me a duplicate rows in the result. Can i eliminate this duplication with a particular column as the key?

Answer 1

You can eliminate complete duplicate rows using the DISTINCT keyword. If there is some key column that is a duplicate but the rest of the columns are not, then you would have to use aggregate functions and a GROUP BY clause to explain to SQL Server what data you do want returned.