Counting Duplicate Rows

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September 29th, 2004, 07:14 AM

Heatup

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Counting Duplicate Rows

I need to be able to count rows that have duplicate values in a particular column and then be able to eliminate all values belonging to the duplicate set from the result returned from a statement. Anyone have any idea how to do this?

September 29th, 2004, 09:02 PM

selwonk

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Try:

Code:

SELECT 
<list of all columns>
FROM 
tablename
GROUP BY 
<list of all columns>
HAVING 
count(*) > 1

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selwonk

If I've posted some code above, you might think it looks a bit simplistic. It might be. I'd rather people tried the next step themselves rather than getting a full solution on a plate. That way they learn more!

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