Re: Cross-classified table
| От | Muhyiddin A.M Hayat |
|---|---|
| Тема | Re: Cross-classified table |
| Дата | |
| Msg-id | 00c201c397c8$57120d00$1f00a8c0@middinkcomp обсуждение исходный текст |
| Ответ на | Cross-classified table (Alexander Pucher <pucher@atlas.gis.univie.ac.at>) |
| Список | pgsql-novice |
> Hi,
> I'm looking for the correct syntax of getting a cross-classified table
> from my SELECT statement.
>
> Let's pretend I have this table:
>
>
> origin sex
> ----------------
> USA male
> USA female
> China male
> China male
> UK male
> USA male
>
>
> and I want as result something like:
>
> male female
>
> USA 2 1
> China 2 0
> UK 1 0
>
>
> How can I get this?
>
You can use below SQL
SELECT
origin,
SUM(
CASE
WHEN (sex ='male') THEN 1
ELSE 0
END
) AS male,
SUM(
CASE WHEN (sex ='female') THEN 1
ELSE 0
END
) AS female
FROM
table1
GROUP BY origin
Best regards,
Muhyiddin A.M Hayat
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