Re: [GENERAL] looking for suggestions
От | Stuart Rison |
---|---|
Тема | Re: [GENERAL] looking for suggestions |
Дата | |
Msg-id | v04020a02b3e80816b232@[128.40.242.190] обсуждение исходный текст |
Ответ на | looking for suggestions (Kevin Heflin <kheflin@shreve.net>) |
Список | pgsql-general |
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 | +--------------------------+--------------------------------------+
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