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-Original Message-
From: Michael Stassen [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 26, 2005 12:08 AM
To: Frederic Wenzel
Cc: Gustafson, Tim; mysql@lists.mysql.com
Subject: Re: Problems with select distinct
Frederic Wenzel wrote:
On Tue, 25
Hello
I am trying to run the following query on my server:
select Documents.ID,
Name
from Documents,
DocumentFiles,
DownloadLog
where Documents.ID = DocumentFiles.Document and
DocumentFiles.ID = DownloadLog.DocumentFile
order by DownloadLog.AddedOn desc
limit 5
I suspect mysql is doing the DISTINCT before the ORDER BY. One of the
reasons I avoid DISTINCT when possible. Try:
SELECT Documents.ID, Name
FROM Documents, DocumentFiles, DownloadLog
WHERE Documents.ID = DocumentFiles.Document
AND DocumentFiles.ID = DownloadLog.DocumentFile
GROUP
On Tue, 25 Jan 2005 08:44:45 -0500, Michael Stassen
[EMAIL PROTECTED] wrote:
I suspect mysql is doing the DISTINCT before the ORDER BY. One of the
reasons I avoid DISTINCT when possible.
Isn't this supposed to be correct? Ordering has to take place as the
very last operation, after any
Frederic Wenzel wrote:
On Tue, 25 Jan 2005 08:44:45 -0500, Michael Stassen
[EMAIL PROTECTED] wrote:
I suspect mysql is doing the DISTINCT before the ORDER BY. One of the
reasons I avoid DISTINCT when possible.
Isn't this supposed to be correct? Ordering has to take place as the
very last
support: email support
Synopsis: Problems Using SELECT INTO OUTFILE
Severity: non-critical
Priority: medium
Category: mysql
Class: sw-bug
Release: mysql-4.0.10-gamma (Source distribution)
Server: /usr/local/MYSQL/bin/mysqladmin Ver 8.40 Distrib 4.0.10-gamma
support: email support
Synopsis: Problems Using SELECT INTO OUTFILE
Severity: non-critical
Priority: medium
Category: mysql
Class: sw-bug
Release: mysql-4.0.10-gamma (Source distribution)
Server: /usr/local/MYSQL/bin/mysqladmin Ver 8.40 Distrib 4.0.10-gamma
I am running Apache/PHP 4/MySQL 3.23 on a Win98.
The following statement will not execute in PHP MyAdmin or through the
browser. However it does run under my SQL tool SQLion:
SELECT contacts.contactId,contacts.firstName,orders.orderId
FROM contacts INNER JOIN orders
ON contacts.contactId =
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
snip
When I try to select rows with floats, the result is an empty set.
This is not a MySQL problem, nor a database one, but a general computer
science one. It is
almost never save to compare two
Hi.
You forgot around temp example:
mysqlselect datetime,temperatura from temperatura where
datetime=2002-02-08 09:30:00 and temperatura=15.8;
Regards
/PM\
Miguel Figueiredo wrote:
Hello all,
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
15.8 has no exact binary representation, so a test for equality will fail.
Do not use floating point if you want to test for equality. Try DECIMAL
Miguel Figueiredo wrote:
Hello all,
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
mysql describe
MySQL manual A.5.7 Problems with floating point comparison
=dn
- Original Message -
From: Gerald Clark [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: 08 February 2002 15:24
Subject: Re: Problems with select
15.8 has no exact binary representation, so a test
Hello all,
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
mysql describe temperatura;
+-+--+--+-+-+---+
| Field| Type | Null | Key | Default | Extra |
Hi.
You forgot around temp example:
mysqlselect datetime,temperatura from temperatura where
datetime=2002-02-08 09:30:00 and temperatura=15.8;
Regards
/PM\
Miguel Figueiredo wrote:
Hello all,
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
snip
When I try to select rows with floats, the result is an empty set.
This is not a MySQL problem, nor a database one, but a general computer
science one. It is
almost never save to compare two
15.8 has no exact binary representation, so a test for equality will fail.
Do not use floating point if you want to test for equality. Try DECIMAL
Miguel Figueiredo wrote:
Hello all,
I have a (probably dumb) question.
My table temperatura has two fields described bellow.
mysql describe
PROTECTED]]
Sent: 26. juni 2001 17:42
To: [EMAIL PROTECTED]
Subject: Re: HELP NEEDED: Problems with SELECT in combination with
HAVING
Try
SELECT robotId, max(startTime) as crit
FROM RobotRun
WHERE startTime = '2001-06-26 00:00:00'
AND endTime IS NOT NULL
GROUP BY robotId
This should return
:[EMAIL PROTECTED]]
Sent: 26. juni 2001 17:42
To: [EMAIL PROTECTED]
Subject: Re: HELP NEEDED: Problems with SELECT in combination with
HAVING
Try
SELECT robotId, max(startTime) as crit
FROM RobotRun
WHERE startTime = '2001-06-26 00:00:00'
AND endTime IS NOT NULL
GROUP BY robotId
This should return
: Re: HELP NEEDED: Problems with SELECT in combination with
HAVING
Try
SELECT robotId, max(startTime) as crit
FROM RobotRun
WHERE startTime = '2001-06-26 00:00:00'
AND endTime IS NOT NULL
GROUP BY robotId
This should return the robotId and the most recent startTime labeled 'crit
Hello there - I have this weird problem using MySql (version 3.23.39).
It seems that MySql interpretation of a SELECT statment using HAVING is
completely random.
I have a table called RobotRun which stores information about when a robot
has been running (start, stop and the id of the robot).
Try
SELECT robotId, max(startTime) as crit
FROM RobotRun
WHERE startTime = '2001-06-26 00:00:00'
AND endTime IS NOT NULL
GROUP BY robotId
This should return the robotId and the most recent startTime labeled 'crit'
for all records specified in the where clause. And have a look in the manual
for
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