I'm having a hard time figuring out why a query in my application is
slow. It seems that MySQL is using a filesort where it's not
necessary, and as a result a query that should be taking a fraction of
a second is taking up to 10 seconds.
Essentially, the query is doing a join of 4 tables, two of
From: Scott Gifford
mysql explain
SELECT mirealsource_homes.mls_num,
mirealsource_homes_supplemental.listdate,
mirealsource_images.image1,
mirealsource_homes_stats.detail_views
FROM mirealsource_homes,
Hello All!
I have a speed problem with LEFT JOIN condition.
SELECT *
FROM t1
INNER JOIN t2 ON t2.c_ID=t1.ID
WHERE
The table2 row count is high. (100 000 records)
This is correct and FAST (1-2 sec), but not good for me. Because I need all
record from table1.
I use this...
SELECT *
From: Gyurasits Zoltn
I have a speed problem with LEFT JOIN condition.
(...)
Why?? Somebody can help me? Tnx!!
You will probably get a lot more useful response if you include the table
structure, the complete query/queries and the output of EXPLAIN for each
query (just put EXPLAIN in front of
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Hi zoltan
if you know difference between inner join and left join, you can conclude than
maybe there are a lot of rows in table1 which do not verify you join condition.
This example show you that the result is different and and add'in where clause
if you want to transform the left join result
Hi scott,
you can use datetime or timestamp. Using timestamp in this example shows you
that now() can be a default or inserted value. You can also use
current_tiumestamp.
Other functions like date_add can help you to look for rows verifying interval
days like in this example :
mysql create table
Hello!
Sorry for the incomplete information...
The complete select is:
SELECT
lt.cikk_ID, SUM(bt.mennyiseg)
FROM traktar_leltartetelek_new lt
LEFT JOIN traktar_mozgas_bizonylat_cikk bt ON bt.cikk_ID=lt.cikk_ID and
bt.raktar_ID=01
WHERE lt.leltar_ID=000
GROUP BY lt.cikk_ID
And table
Hi,
Have you tried this ? i said the length, so you can rise it until working for
tests. I used 32k and it works without any problem. I can remind that with a
blob it works also :
mysql create table t1( asunto varbinary(32000), asun varbinary(16) );
Query OK, 0
Hello Mathias!
I know what is the difference between LEFT and INNER JOIN.
I need the NULL records too.
mysql select * from a left join b on a.id=b.id;
+--+-+--+-+
| id | txt | id | txt |
+--+-+--+-+
|1 | a test1 |1 | b test1
I want to install MySQL 4 on Fedora Core 2.
Questions:
#1. Do I need to uninstall MySQL 3 from the server first?
#2. Where I can get source for MySQL 4?
Thanks
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Jerry Swanson wrote:
#1. Do I need to uninstall MySQL 3 from the server first?
Not really.
#2. Where I can get source for MySQL 4?
At your local 7/11. They usually store it hidden behind the counter along
with the most popular nuclear launch codes.
If they are out of stock, you might
I want to install MySQL 4 on Fedora Core 2.
Questions:
#1. Do I need to uninstall MySQL 3 from the server first?
http://dev.mysql.com/doc/mysql/en/upgrading-from-3-23.html
#2. Where I can get source for MySQL 4?
http://dev.mysql.com/downloads/
Go to the page of the version you like to
I want to use a mysql database in a cygwin application (GRASS). Should I
install mysql under cygwin or does exist any possibilities to use the
database with myodbc under cygwin only? Thanks, Jan
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Version: AVK 15.0.5403 from 10.06.2005
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MySQL
Hi ashok,
With check, you could do iy, but they don't work with mysql.
The only solution i ican see is an application control or :
drop table if exists tempo;
create table tempo like mine;
insert into tempo values('','');
insert into mine select * from tempo where length(...)0;
drop table tempo;
Jan Bartholdy [EMAIL PROTECTED] wrote on 06/13/2005
07:18:22 AM:
I want to use a mysql database in a cygwin application (GRASS). Should I
install mysql under cygwin or does exist any possibilities to use the
database with myodbc under cygwin only? Thanks, Jan
Virus checked
I have to load my remote MySQL db's with about a gig of data -
phpMyAdmin only allows me to upload a 15MB CSV file, so I have to
painstakingly separate my data into 15MB chunks and upload them one
at a time. It's a huge pain and takes about two entire days. Is there
a better solution??
hi,
do you have SSH access to the server ?
Peter
Brian Dunning wrote:
I have to load my remote MySQL db's with about a gig of data -
phpMyAdmin only allows me to upload a 15MB CSV file, so I have to
painstakingly separate my data into 15MB chunks and upload them one at
a time. It's a
You might want to try BigDump
http://www.ozerov.de/bigdump.php
I can't tell how it will cope with 1 GB of data though.
David
Brian Dunning wrote:
I have to load my remote MySQL db's with about a gig of data -
phpMyAdmin only allows me to upload a 15MB CSV file, so I have to
painstakingly
At 10:00 AM 6/13/05, Brian Dunning wrote:
I have to load my remote MySQL db's with about a gig of data -
phpMyAdmin only allows me to upload a 15MB CSV file, so I have to
painstakingly separate my data into 15MB chunks and upload them one
at a time. It's a huge pain and takes about two entire
On Jun 13, 2005, at 7:06 AM, Peter wrote:
do you have SSH access to the server ?
No. :(
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On Jun 13, 2005, at 7:10 AM, replies-lists-
[EMAIL PROTECTED] wrote:
do you have shell access to the server?
I see that there is some talk about uploading myshell or phpshell to
the server, so it appears that that is an option. I don't know the
first thing about what that is or how it
Brian,
How about an FTP service on your remote server?
Mikhail Berman
-Original Message-
From: Brian Dunning [mailto:[EMAIL PROTECTED]
Sent: Monday, June 13, 2005 10:01 AM
To: mysql@lists.mysql.com
Subject: How to load a remote db with lots of data?
I have to load my remote MySQL
Hi,
there is nothing simplier and faster than load data infile (LOCAL) since you can
connect to the server
Mathias
Selon Berman, Mikhail [EMAIL PROTECTED]:
Brian,
How about an FTP service on your remote server?
Mikhail Berman
-Original Message-
From: Brian Dunning
hi..
i have a table that i want to add a column to, and define the columm to be
the primary key. however, i already have a column in the table that's used
as the primary. can someone tell me the approach/commands i should use to
get my results?
table foo
username varchar(50), primary
what i
On Jun 13, 2005, at 7:18 AM, Berman, Mikhail wrote:
How about an FTP service on your remote server?
No - I actually don't have any remote access directly to the MySQL
server. My ISP has separate machines for the database servers and the
web servers - I can do a lot with my web server, but
From: bruce
table foo
username varchar(50), primary
what i want...
userid int(), primary
username varchar(50)
with userid listed before username!!
can someone tell me what the commands are that i need to enter to get
this!!
http://dev.mysql.com/doc/mysql/en/alter-table.html
ALTER TABLE
Hi Brain,
I have to believe that this task shapes to be more administrative than
technical.
There are number of ways to upload a file, but you need access to the
MySQL server.
Would it be possible for you to talk to your ISP to allow some type of
remote access to MySQL server?
You could
Alter table foo drop Primary Key
Alter table add `userid` int(8) first
Alter table add Primary Key `userid`
Those 3 statements should do it. However, knowing the people on this list,
they will have a faster and better way than mine.
Don't forget about the manual as well...
bruce wrote:
hi..
i have a table that i want to add a column to, and define the columm to be
the primary key. however, i already have a column in the table that's used
as the primary. can someone tell me the approach/commands i should use to
get my results?
table foo
username varchar(50),
At 10:36 AM 6/13/05, Brian Dunning wrote:
On Jun 13, 2005, at 7:18 AM, Berman, Mikhail wrote:
How about an FTP service on your remote server?
No - I actually don't have any remote access directly to the MySQL
server. My ISP has separate machines for the database servers and the
web servers
From: Philippe Poelvoorde
[Note,
ALTER TABLE foo ADD userid integer unsigned NOT NULL auto_increment
BEFORE username, ADD PRIMARY KEY(userid);
does not seems to work, possibly a bug ?
]
No, you forgot the DROP PRIMARY KEY ;-)
ALTER TABLE `foo` DROP PRIMARY KEY, ADD `userid` INTEGER UNSIGNED
Hello.
Use the rpm or binary distribution from:
http://dev.mysql.com/downloads/mysql/4.1.html
If you install MySQL using rpm with -U command line option, it will
remove the old package. You may meet some problems using PHP or Perl
when you try to connect through they was compiled for
This is our situation: We have two servers running RHES3 with samba
connections to a server running RHES4. (No, it's not dns. Believe me
when I say I don't ever want to go through *that* pain again) Our ES4
server contains shared data that is not controlled through cvs. Our two
ES3 servers contain
Hi,
you can configure bin-log on one, and send logs the second server for sync.
you will have an almost real-time synchronization env.
problem is that you MUST use inodb for ttansactions, and apply exactly the
changes to the standby server.
no replication, no cluster.
This is a simple but needed
I cannot find any information on this, so I am thinking the answer is no. But I
have a column that I would like to change the name of:
current the column name isID, and I would like it to change it to CHILD_ID,
as the the software is changing, and we are adding parent_id column.
Thanks,
Scott
Jigal van Hemert wrote:
From: Philippe Poelvoorde
[Note,
ALTER TABLE foo ADD userid integer unsigned NOT NULL auto_increment
BEFORE username, ADD PRIMARY KEY(userid);
does not seems to work, possibly a bug ?
]
No, you forgot the DROP PRIMARY KEY ;-)
well not really, that's the statement
i am trying to create a table as follows:
CREATE TABLE ID (
mat INT PRIMARY KEY UNIQUE,
ID_firstname CHAR(35),
ID_lastname CHAR(35),
ID_ramqnb CHAR(12),
ID_numciv_hosp CHAR(10) DEFAULT '-9',
ID_appt_hosp CHAR(10) DEFAULT '-9',
ID_streetname_hosp CHAR(75) DEFAULT '-9',
ID_streettype_hosp CHAR(6)
Hey guys,
I am not able to install properly mysql. Please see below the technical
details or the bug report.
The installation goes well until I try to add the root user :
[EMAIL PROTECTED]:/usr/bin mysqladmin -u root -h fujitsu password x
mysqladmin: connect to server at 'fujitsu' failed
I just ran the creates on 4.0.20 on LINUX and 5.0.6 on Windows and they
both seem to look fine {see the SHOW CREATE TABLE's following the CREATE
TABLE statements}
RUN ON 4.0.20
mysql CREATE TABLE ID (
- mat INT UNIQUE PRIMARY KEY,
- ID_firstname CHAR(35) DEFAULT 'filler',
-
Gordon Bruce wrote:
I just ran the creates on 4.0.20 on LINUX and 5.0.6 on Windows
i was running 5.0.4 on Windows:
mysql \s
--
mysql Ver 14.9 Distrib 5.0.4-beta, for Win32 (ia32)
switching to 5.0.6 now. anyone wanna make a bet ;-)
les schaffer
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Les Schaffer wrote:
Gordon Bruce wrote:
I just ran the creates on 4.0.20 on LINUX and 5.0.6 on Windows
i was running 5.0.4 on Windows:
mysql \s
--
mysql Ver 14.9 Distrib 5.0.4-beta, for Win32 (ia32)
switching to 5.0.6 now. anyone wanna make a bet ;-)
les schaffer
Les Schaffer wrote:
Gordon Bruce wrote:
I just ran the creates on 4.0.20 on LINUX and 5.0.6 on Windows
i was running 5.0.4 on Windows:
mysql \s
--
mysql Ver 14.9 Distrib 5.0.4-beta, for Win32 (ia32)
switching to 5.0.6 now. anyone wanna make a bet ;-)
les schaffer
Gordon Bruce wrote:
I just ran the creates on 4.0.20 on LINUX and 5.0.6 on Windows
upgrading to 5.0.6 solved the problem.
do i need to let MySQL developers know about this or do they monitor the
list or once a release is gone, i can assume THIS problem was fixed?
thanks to all for the
Jan Bartholdy wrote:
I want to use a mysql database in a cygwin application (GRASS). Should I
install mysql under cygwin or does exist any possibilities to use the
database with myodbc under cygwin only? Thanks, Jan
I believe people have gotten MySQL to build under Cygwin, but you should
be
[EMAIL PROTECTED] wrote:
If I understand Cygwin correctly, it is a Linux shell that runs under
Windows.
Uh, sort of.
Cygwin is a GNU environment ported to Windows. You've got your bash,
your GCC, your ls, etc. To make all this work with minimal porting,
there's a Cygwin DLL and library
Hi,
Anyone experience this problem. I did the following:
C:\perlsrcmysql -f --user=root --password= --port=3307
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 48 to server version: 5.0.6-beta-nt-log
Type 'help;' or '\h' for help. Type '\c' to clear
Hi,
Anyone experience this problem. I did the following:
C:\perlsrcmysql -f --user=root --password= --port=3307
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 48 to server version: 5.0.6-beta-nt-log
Type 'help;' or '\h' for help. Type '\c' to clear the
You'll need three alter statements:
- one to add the new column
- one to get rid of the old primary key
- one to set the new column as the primary key
Something like this, i.e. I've left out some details of the syntax:
ALTER TABLE FOO ADD USERID CHAR(8);
ALTER TABLE FOO DROP PRIMARY KEY;
ALTER
I'm not sure if this will work for a column name but there is a CHANGE
COLUMN feature in the ALTER TABLE statement so that sounds promising. Then
again, I don't have a MySQL system to try it on this week - I am
travelling - so I can't be sure if it will work for the column name.
Rhino
Why not just
ALTER TABLE tbl_Foo CHANGE `ID` `CHILD_ID` options go here
Since I don't know the rest of your options or what you want to change the
column to, that's just for the name change.
J.R.
-Original Message-
From: Rhino [mailto:[EMAIL PROTECTED]
Sent: Monday, June 13, 2005
Kevin,
Thanks for your answer. See below the results :
* I' really wondering if there is not any missing files.
* The mysql.soc file is complettly empty
* I can only access myssql when I am not in root.
* I can only see 1 database test when I know there is others like zorum
which is working
* The
Kevin,
In addition to that, the ZORUM database works because when I stop mysql, the
following site stops working :
http://www.wxy.nl/zorum_3_5/ with the database ZORUM
Here PHPadmin doesn't give me any privilege to create anything :
http://www.wxy.nl/phpMyAdmin/
I beleive I'm not to far from
Hi all
As part of an automated patch system, I am facing the following problem:
* A script will update the program from version x to version y
* The script contains file actions, and database (mysql) actions
* The actions are executed in order
* For each action, a backup copy is created (if
Hi andy,
Before starting your migration maake sur to stop mysql and copy all the
datadir to another backup dir (just like directories).
About single transaction, this will be difficult since you manage myisam
tables.
So what we can think to is :
1. execute one query
2. check log
3. if OK,
From: Scott Purcell
I cannot find any information on this, so I am thinking the answer is no.
But I have a column that I would like to change the name of:
current the column name isID, and I would like it to change it to
CHILD_ID, as the the software is changing, and we are adding parent_id
From: Philippe Poelvoorde
No, you forgot the DROP PRIMARY KEY ;-)
well not really, that's the statement before ! ;-)
Sorry, I misread your mail.
So is that normal that I can't specify BEFORE username ?
Yes, because MySQL only supports AFTER `column_name` ;-P
Yannick,
MySQL is very picky in how it handles security, or at least different.
It has an extra layer of complexity, compared to say, the Informix
RDBMS, which uses the OS user/password and grant statements. With that
being said, have you run the post-install steps to add users to the
mysql
Dear friends,
I'm using win2000 with VC++. In this now i wrote one
console application for invoking MySQL Database. After
creating the .exe file, if i try to run that means its
giving the error that can't find the specified file
libmysql.dll. So i added the path of limysql.dll in
env path
Ashok
is it possible to embed that dll
file with my project itself, rather than adding the
path to env path var. when i'll try to run that means
it never ask for the path. Is it possible?
There are 3P tools which do that (Google for embed dll), but wouldn't
it be simpler to put the dll in
Thanks for your response, Jigal. More below...
Jigal van Hemert [EMAIL PROTECTED] writes:
From: Scott Gifford
[...]
Apparently MySQL's optimizer sees that it can use the primary key for
mirealsource_home_supplemental to do the query, but for some reason
decides not to.
This is often the
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