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  3. January 2007

Re: SQL - multiple rows for same customer, but only want earliest one

On 1/11/07, Richard Casey <casey_r@xxxxxxxxxxxxxxxx> wrote:


The full form of the FETCH clause is "FETCH FIRST nnn ROWS ONLY". That is
handy for selecting a subset of your complete result set. With ORDER BY
xxx
and GROUP BY xxx/HAVING xxx, you can do all sorts of stuff. For example,
getting a list of the top 10 customers based on total number of
transactions
is as easy as:

SELECT customer,count(*)
FROM transactionfile
GROUP BY customer
ORDER BY count(*) desc
FETCH FIRST 10 ROWS ONLY



Now I can see value in that.  Thanks for the explanation Richard!

- Dan

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