From: Grigory Batalov <grisxa@mail.ru> To: community@altlinux.ru Subject: [Comm] Re: PostgreSQL string functions Date: Tue, 4 Feb 2003 12:31:51 +0300 Message-ID: <20030204093151.GA29699@lrn.ru> (raw) Tue, 4 Feb 2003 11:15:52 +0200 Dmytro O. Redchuk wrote: >> > >> Собственно, вопрос: >> > >> Есть ли в postgres такая функция strstr, substr или им подобные, >> > >> чтобы сделать сразу select substr(strstr(login,'\'),1) as login ? >> > >> Или можно решить эту задачу другим способом? >Мне кажется, можно. >(Там в доке много строковых функций). >(Или ошибаюсь?..) Есть! Несколько громоздко получилось, но зато работает: select substring(login from position(chr(92) in login) + 1) as login, sum(bytes) as bytes from squid_raw_log where time >= $time1 and time < $time2 group by substring(login from position(chr(92) in login) + 1) order by bytes desc; Что скажете? $time1 и $time2 задаются из php для уменьшения выборки. -- Grigory Batalov
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