Обсуждение: RE: [GENERAL] No MAX function
SET QUERY_LIMIT TO restricts the number of rows returned. I want to determine the largest value in a column. Sorry if my question was unclear, I am new to %SQL. Jonny -----Original Message----- From: Neil Burrows [mailto:maillist@remo.demon.co.uk] Sent: Saturday, February 06, 1999 1:51 PM To: Jonny Hinojosa Cc: psql-general@postgresql.org Subject: RE: [GENERAL] No MAX function Hi, I believe there is a patch in "contrib" directory that does this, but if you have Postgres 6.4 then have a look at the SET QUERY_LIMIT TO command. Regards, ---[ Neil Burrows ]----------------------------------------------------- E-mail: neil@pawprint.co.uk ** This e-mail was ** Web : http://www.remo.demon.co.uk/ ** Made in Scotland ** -------< PGP Key available from http://www.remo.demon.co.uk/pgp/ >-------- > -----Original Message----- > From: owner-pgsql-general@postgreSQL.org > [mailto:owner-pgsql-general@postgreSQL.org]On Behalf Of Jonny Hinojosa > Sent: 06 February 1999 19:13 > To: PostGreSQL Mailing List > Subject: [GENERAL] No MAX function > > > Does anyone have a work around for the lack of a MAX function ? I need to > find the last record WHERE a LIKE 'x' AND b LIKE 'y'. > > Jonny Hinojosa > TCA Internet > Jonny@TCA.net > 409.693.8885 > >
On Sat, 6 Feb 1999, Jonny Hinojosa wrote:
select * from events
where event_id=(select max(event_id) from events);
That works in my event database.
// SET QUERY_LIMIT TO restricts the number of rows returned. I want to
// determine the largest value in a column. Sorry if my question was unclear,
// I am new to %SQL.
//
// Jonny
//
// -----Original Message-----
// From: Neil Burrows [mailto:maillist@remo.demon.co.uk]
// Sent: Saturday, February 06, 1999 1:51 PM
// To: Jonny Hinojosa
// Cc: psql-general@postgresql.org
// Subject: RE: [GENERAL] No MAX function
//
//
// Hi,
//
// I believe there is a patch in "contrib" directory that does this, but if you
// have Postgres 6.4 then have a look at the
//
// SET QUERY_LIMIT TO
//
// command.
//
// Regards,
//
// ---[ Neil Burrows ]-----------------------------------------------------
// E-mail: neil@pawprint.co.uk ** This e-mail was **
// Web : http://www.remo.demon.co.uk/ ** Made in Scotland **
// -------< PGP Key available from http://www.remo.demon.co.uk/pgp/ >--------
//
//
//
// > -----Original Message-----
// > From: owner-pgsql-general@postgreSQL.org
// > [mailto:owner-pgsql-general@postgreSQL.org]On Behalf Of Jonny Hinojosa
// > Sent: 06 February 1999 19:13
// > To: PostGreSQL Mailing List
// > Subject: [GENERAL] No MAX function
// >
// >
// > Does anyone have a work around for the lack of a MAX function ? I need to
// > find the last record WHERE a LIKE 'x' AND b LIKE 'y'.
// >
// > Jonny Hinojosa
// > TCA Internet
// > Jonny@TCA.net
// > 409.693.8885
// >
// >
//
//
//
--
Principal Member Technical Staff, beyond.com The world is watching America,
pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <dustin@spy.net>
| Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE
L______________________________________________ and America is watching TV. __
On v6.4.2, I get :
cdmwhere=> SELECT * FROM traplog WHERE millisid=
(SELECT MAX(millisid) FROM traplog
WHERE esn LIKE '0f:11:19:82:54:35');
ERROR: No such function 'max' with the specified attributes
cdmwhere=>
Jonny
-----Original Message-----
From: dustin sallings [mailto:dustin@spy.net]
Sent: Saturday, February 06, 1999 2:21 PM
To: Jonny Hinojosa
Cc: PostGreSQL Mailing List
Subject: RE: [GENERAL] No MAX function
On Sat, 6 Feb 1999, Jonny Hinojosa wrote:
select * from events
where event_id=(select max(event_id) from events);
That works in my event database.
// SET QUERY_LIMIT TO restricts the number of rows returned. I want to
// determine the largest value in a column. Sorry if my question was
unclear,
// I am new to %SQL.
//
// Jonny
//
// -----Original Message-----
// From: Neil Burrows [mailto:maillist@remo.demon.co.uk]
// Sent: Saturday, February 06, 1999 1:51 PM
// To: Jonny Hinojosa
// Cc: psql-general@postgresql.org
// Subject: RE: [GENERAL] No MAX function
//
//
// Hi,
//
// I believe there is a patch in "contrib" directory that does this, but if
you
// have Postgres 6.4 then have a look at the
//
// SET QUERY_LIMIT TO
//
// command.
//
// Regards,
//
// ---[ Neil
urrows ]-----------------------------------------------------
// E-mail: neil@pawprint.co.uk ** This e-mail was
**
// Web : http://www.remo.demon.co.uk/ ** Made in Scotland
**
// -------< PGP Key available from http://www.remo.demon.co.uk/pgp/
>--------
//
//
//
// > -----Original Message-----
// > From: owner-pgsql-general@postgreSQL.org
// > [mailto:owner-pgsql-general@postgreSQL.org]On Behalf Of Jonny Hinojosa
// > Sent: 06 February 1999 19:13
// > To: PostGreSQL Mailing List
// > Subject: [GENERAL] No MAX function
// >
// >
// > Does anyone have a work around for the lack of a MAX function ? I need
to
// > find the last record WHERE a LIKE 'x' AND b LIKE 'y'.
// >
// > Jonny Hinojosa
// > TCA Internet
// > Jonny@TCA.net
// > 409.693.8885
// >
// >
//
//
//
--
Principal Member Technical Staff, beyond.com The world is watching
America,
pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <dustin@spy.net>
| Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE
L______________________________________________ and America is watching TV.
__
On Sat, 6 Feb 1999, Jonny Hinojosa wrote:
// cdmwhere=> SELECT * FROM traplog WHERE millisid=
// (SELECT MAX(millisid) FROM traplog
// WHERE esn LIKE '0f:11:19:82:54:35');
// ERROR: No such function 'max' with the specified attributes
// cdmwhere=>
What's a millisid? If it's something obscure, there may not have
been a max() defined for it.
//
// -----Original Message-----
// From: dustin sallings [mailto:dustin@spy.net]
// Sent: Saturday, February 06, 1999 2:21 PM
// To: Jonny Hinojosa
// Cc: PostGreSQL Mailing List
// Subject: RE: [GENERAL] No MAX function
//
//
// On Sat, 6 Feb 1999, Jonny Hinojosa wrote:
//
// select * from events
// where event_id=(select max(event_id) from events);
//
// That works in my event database.
//
// // SET QUERY_LIMIT TO restricts the number of rows returned. I want to
// // determine the largest value in a column. Sorry if my question was
// unclear,
// // I am new to %SQL.
// //
// // Jonny
// //
// // -----Original Message-----
// // From: Neil Burrows [mailto:maillist@remo.demon.co.uk]
// // Sent: Saturday, February 06, 1999 1:51 PM
// // To: Jonny Hinojosa
// // Cc: psql-general@postgresql.org
// // Subject: RE: [GENERAL] No MAX function
// //
// //
// // Hi,
// //
// // I believe there is a patch in "contrib" directory that does this, but if
// you
// // have Postgres 6.4 then have a look at the
// //
// // SET QUERY_LIMIT TO
// //
// // command.
// //
// // Regards,
// //
// // ---[ Neil
// urrows ]-----------------------------------------------------
// // E-mail: neil@pawprint.co.uk ** This e-mail was
// **
// // Web : http://www.remo.demon.co.uk/ ** Made in Scotland
// **
// // -------< PGP Key available from http://www.remo.demon.co.uk/pgp/
// >--------
// //
// //
// //
// // > -----Original Message-----
// // > From: owner-pgsql-general@postgreSQL.org
// // > [mailto:owner-pgsql-general@postgreSQL.org]On Behalf Of Jonny Hinojosa
// // > Sent: 06 February 1999 19:13
// // > To: PostGreSQL Mailing List
// // > Subject: [GENERAL] No MAX function
// // >
// // >
// // > Does anyone have a work around for the lack of a MAX function ? I need
// to
// // > find the last record WHERE a LIKE 'x' AND b LIKE 'y'.
// // >
// // > Jonny Hinojosa
// // > TCA Internet
// // > Jonny@TCA.net
// // > 409.693.8885
// // >
// // >
// //
// //
// //
//
// --
// Principal Member Technical Staff, beyond.com The world is watching
// America,
// pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <dustin@spy.net>
// | Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE
// L______________________________________________ and America is watching TV.
// __
//
//
//
--
Principal Member Technical Staff, beyond.com The world is watching America,
pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <dustin@spy.net>
| Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE
L______________________________________________ and America is watching TV. __
It depends of data type - unfortunately max was not defined for ALL appropriate types. Through testo=> select max(bypref) from inetspec; max --- 24 where bypref is int2. On Sat, 6 Feb 1999, dustin sallings wrote: > Date: Sat, 6 Feb 1999 13:10:56 -0800 (PST) > From: dustin sallings <dustin@spy.net> > To: Jonny Hinojosa <Jonny@TCA.net> > Cc: PostGreSQL Mailing List <pgsql-general@postgreSQL.org> > Subject: RE: [GENERAL] No MAX function > > On Sat, 6 Feb 1999, Jonny Hinojosa wrote: > > // cdmwhere=> SELECT * FROM traplog WHERE millisid= > // (SELECT MAX(millisid) FROM traplog > // WHERE esn LIKE '0f:11:19:82:54:35'); > // ERROR: No such function 'max' with the specified attributes > // cdmwhere=> > > What's a millisid? If it's something obscure, there may not have > been a max() defined for it. > > // > // -----Original Message----- > // From: dustin sallings [mailto:dustin@spy.net] > // Sent: Saturday, February 06, 1999 2:21 PM > // To: Jonny Hinojosa > // Cc: PostGreSQL Mailing List > // Subject: RE: [GENERAL] No MAX function > // > // > // On Sat, 6 Feb 1999, Jonny Hinojosa wrote: > // > // select * from events > // where event_id=(select max(event_id) from events); > // > // That works in my event database. > // > // // SET QUERY_LIMIT TO restricts the number of rows returned. I want to > // // determine the largest value in a column. Sorry if my question was > // unclear, > // // I am new to %SQL. > // // > // // Jonny > // // > // // -----Original Message----- > // // From: Neil Burrows [mailto:maillist@remo.demon.co.uk] > // // Sent: Saturday, February 06, 1999 1:51 PM > // // To: Jonny Hinojosa > // // Cc: psql-general@postgresql.org > // // Subject: RE: [GENERAL] No MAX function > // // > // // > // // Hi, > // // > // // I believe there is a patch in "contrib" directory that does this, but if > // you > // // have Postgres 6.4 then have a look at the > // // > // // SET QUERY_LIMIT TO > // // > // // command. > // // > // // Regards, > // // > // // ---[ Neil > // urrows ]----------------------------------------------------- > // // E-mail: neil@pawprint.co.uk ** This e-mail was > // ** > // // Web : http://www.remo.demon.co.uk/ ** Made in Scotland > // ** > // // -------< PGP Key available from http://www.remo.demon.co.uk/pgp/ > // >-------- > // // > // // > // // > // // > -----Original Message----- > // // > From: owner-pgsql-general@postgreSQL.org > // // > [mailto:owner-pgsql-general@postgreSQL.org]On Behalf Of Jonny Hinojosa > // // > Sent: 06 February 1999 19:13 > // // > To: PostGreSQL Mailing List > // // > Subject: [GENERAL] No MAX function > // // > > // // > > // // > Does anyone have a work around for the lack of a MAX function ? I need > // to > // // > find the last record WHERE a LIKE 'x' AND b LIKE 'y'. > // // > > // // > Jonny Hinojosa > // // > TCA Internet > // // > Jonny@TCA.net > // // > 409.693.8885 > // // > > // // > > // // > // // > // // > // > // -- > // Principal Member Technical Staff, beyond.com The world is watching > // America, > // pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <dustin@spy.net> > // | Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE > // L______________________________________________ and America is watching TV. > // __ > // > // > // > > -- > Principal Member Technical Staff, beyond.com The world is watching America, > pub 1024/3CAE01D5 1994/11/03 Dustin Sallings <dustin@spy.net> > | Key fingerprint = 87 02 57 08 02 D0 DA D6 C8 0F 3E 65 51 98 D8 BE > L______________________________________________ and America is watching TV. __ > > > Aleksei Roudnev, Network Operations Center, Relcom, Moscow (+7 095) 194-19-95 (Network Operations Center Hot Line),(+7 095) 230-41-41, N 13729 (pager) (+7 095) 196-72-12 (Support), (+7 095) 194-33-28 (Fax)