RE: [SQL] Query from multiple tables...
От | Diehl, Jeffrey |
---|---|
Тема | RE: [SQL] Query from multiple tables... |
Дата | |
Msg-id | B51F0C636E578A4E832D3958690CD73E0130BD9E@es04snlnt обсуждение исходный текст |
Список | pgsql-general |
I wasn't splitting it up because I doubted postgres could handle the volume. I verified that at the beginning of the project. I split the data up because my database gets between 5 and 15 Million new records A DAY. We are trying to keep about 45 days worth of data. Queries on such a volume are extremely painfull. Keeping the data in one table simply isn't an option. BTW, the system runs on a dual 733Mh PentiumIII with 1Gb of RAM. I'm using 8 18Gb SCSI drives at 10K RPM. Raid 5. I'm in the process of adding an ADDITIONAL 8x36Gb RAID cabinet. You don't have to tell me how well postgres scales. I've proven that. ;^) Thanx for your time. Mike Diehl. -----Original Message----- From: Christopher Sawtell To: Diehl, Jeffrey; pgsql-sql@postgresql.org; pgsql-general@postgresql.org Cc: Diehl, Jeffrey Sent: 1/16/01 3:41 PM Subject: Re: [SQL] Query from multiple tables... On Wed, 17 Jan 2001 09:46, Diehl, Jeffrey wrote: > Hi all, > > I have a database, that because of the size of the data, I have separated > on day's worth of data into it's own table. postgreSQL will manage absolutely huge tables without problems. ( 2GB, & 4GB with that file size setting in the kernel ) Why do you have to cut the data into smaller tables? > I have a separate table for > each of, say, 30 days. I would like to write a query that will query the > last 15 days worth of tables. Can this be done? No problem, if you leave the data in one table. > I tried to use a view; that didn't work. I tried to use the union clause; > that didn't allow me to do group by... > > Is there a better way than to have my program rewrite the sql on the fly? you can issue queries direct from the shell script which would allow you to use shell variables to hold the date datum. -- Sincerely etc., NAME Christopher Sawtell CELL PHONE 021 257 4451 ICQ UIN 45863470 EMAIL csawtell @ xtra . co . nz CNOTES ftp://ftp.funet.fi/pub/languages/C/tutorials/sawtell_C.tar.gz -->> Please refrain from using HTML or WORD attachments in e-mails to me <<--
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