Re: Query performance question
От | Lukas Ertl |
---|---|
Тема | Re: Query performance question |
Дата | |
Msg-id | Pine.BSF.4.33.0103291141270.17729-100000@pcle2.cc.univie.ac.at обсуждение исходный текст |
Ответ на | Query performance question (Lukas Ertl <l.ertl@univie.ac.at>) |
Список | pgsql-novice |
On Thu, 29 Mar 2001, Vijay Deval wrote: > URL is a very large field. If an extra field is created which gives a > neumeric id to the url, run the query on the number, and then get the desired > output I have to admit, that I quite don't understand what you want me to do here... I already have that numeric id: > > httplog=# \d referrer > > Table "referrer" > > Attribute | Type | Modifier > > -----------+--------------+---------- > > id | integer | > > url | varchar(300) | > > Index: referrer_pkey If I say: SELECT count(*), referrer.id FROM hits, referrer WHERE referrer.id = referrer_id GROUP BY referrer.id ORDER BY count DESC LIMIT 10; it is really fast and I get the IDs of the referrer-urls but how would I get the URLs then? regards, le -- Lukas Ertl eMail: l.ertl@univie.ac.at WWW-Redaktion Tel.: (+43 1) 4277-14073 Zentraler Informatikdienst (ZID) Fax.: (+43 1) 4277-9140 der Universität Wien
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