Re: Why using "Group By"
From: Damjan S. Vujnović <damjan_at_NO_SPAM.galeb.etf.bg.ac.yu>
Date: Thu, 13 Mar 2003 20:23:32 +0100
Message-ID: <b4qlq3$rbo$1_at_news.etf.bg.ac.yu>
>
>
> select CUSTOMER_CITY, CNT from (
> SELECT
> CUSTOMER_CITY,
> SOME_OTHER_CUSTOMER_TABLE_ATTRIBUTE,
> COUNT(*) as CNT
> FROM
> CUSTOMER_TABLE
> -- implicit GBY
> )
>
>
Date: Thu, 13 Mar 2003 20:23:32 +0100
Message-ID: <b4qlq3$rbo$1_at_news.etf.bg.ac.yu>
Mikito Harakiri wrote:
> "Damjan S. Vujnovi??" <damjan_at_NO_SPAM.galeb.etf.bg.ac.yu> wrote in message
> news:b4prme$fnl$1_at_news.etf.bg.ac.yu...
>
>>How will you write (using your sintax) something like this: >> >>SELECT >> CUSTOMER_CITY, COUNT(*) >>FROM >> CUSTOMER_TABLE >>GROUP BY >> CUSTOMER_CITY, SOME_OTHER_CUSTOMER_TABLE_ATTRIBUTE
>
>
> select CUSTOMER_CITY, CNT from (
> SELECT
> CUSTOMER_CITY,
> SOME_OTHER_CUSTOMER_TABLE_ATTRIBUTE,
> COUNT(*) as CNT
> FROM
> CUSTOMER_TABLE
> -- implicit GBY
> )
>
>
SELECT MAX(y) AS maxcount
FROM (SELECT COUNT(*) AS y
FROM t
GROUP BY x)
-- Regards, Damjan S. Vujnovic University of Belgrade School of Electrical Engineering Department of Computer Engineering & Informatics Belgrade, Serbia http://galeb.etf.bg.ac.yu/~damjan/Received on Thu Mar 13 2003 - 20:23:32 CET