Обсуждение: looking for suggestions

Поиск
Список
Период
Сортировка

looking for suggestions

От
Kevin Heflin
Дата:
I've got a single table which lists usernames, addressinfo and signup
dates

signup date is data type 'date'

I'm wondering if it's possible through the magic of SQL to run a query
like:

select * from table where signupdate > '01/01/1999' and < '04/01/1999';

then in the results, I would like to break this down by months. So I can
show total signups for january 1999, then February 1999 etc..


Kevin





--------------------------------------------------------------------
Kevin Heflin          | ShreveNet, Inc.      | Ph:318.222.2638 x103
VP/Mac Tech           | 333 Texas St #175    | FAX:318.221.6612
kheflin@shreve.net    | Shreveport, LA 71101 | http://www.shreve.net
--------------------------------------------------------------------


Re: [GENERAL] looking for suggestions

От
Stuart Rison
Дата:
At 9:10 pm -0500 23/8/99, Kevin Heflin wrote:
>I've got a single table which lists usernames, addressinfo and signup
>dates
>
>signup date is data type 'date'
>
>I'm wondering if it's possible through the magic of SQL to run a query
>like:
>
>select * from table where signupdate > '01/01/1999' and < '04/01/1999';

Hi Kevin,

Two ways to define a range:

WHERE signupdate > '01/01/1999'
AND signupdate < '04/01/1999';

or using syntaxtic sugar:

WHERE signupdate BETWEEN '01/01/1999' AND '04/01/1999';

>then in the results, I would like to break this down by months. So I can
>show total signups for january 1999, then February 1999 etc..

Try something like the following:

SELECT date_part('month',date_report) AS month,
date_part('year',date_report) AS year, count(*) AS sign_ups
FROM path_reports
WHERE date_report BETWEEN '01/01/1950' and '01/01/2000'
GROUP BY by 1,2 -- group by year and month
ORDER BY 3; -- order by if you want a different order then implied by group
in this instance we sort by number of signups

HTH,

S.




+--------------------------+--------------------------------------+
| Stuart C. G. Rison       | Ludwig Institute for Cancer Research |
+--------------------------+ 91 Riding House Street               |
| N.B. new phone code!!    | London, W1P 8BT                      |
| Tel. +44 (0)207 878 4041 | UNITED KINGDOM                       |
| Fax. +44 (0)207 878 4040 | stuart@ludwig.ucl.ac.uk              |
+--------------------------+--------------------------------------+