Hi folks, this is my first question in this mailing list.
How do you do a top-n analysis while avoiding subqueries, but still use
group functions on other columns?
I have following Query:
SELECT COUNT(city) quantity, city
FROM customer
GROUP BY city
ORDER BY quantity DESC;
This works fine so far with the exception that I only want the first record
returned, instead of all. I tried to solve the problem with the ROWNUM
function, but it won't work well. The problem here is that I must include
ROWNUM in the GROUP BY clause, else the query fails. But then the result
isn't right anymore. I wish there was any sort of LIMIT BY clause, like
there is in MySQL.
How can I solve this, while not using any subqueries?
Regards,
Tristan
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Tristan van Essen
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