Hi all,
if we just know the table name but don't know the name of primary key, is there
any variables or constants could instead of the PK?
for example:
there is a table game_log, and now I have the last inserted_id but don't know
what its primary_id is,
how can I SELECT * FROM game_log
Hi,
Use
*SELECT * FROM game_log WHERE this_table's_PK = last_insert_id()*
It will help you.
Regards,
Thiyaghu CK,
MySQL DBA
www.mafiree.com
2010/2/1 曹凯 tx...@hotmail.com
Hi all,
if we just know the table name but don't know the name of primary key, is
there any variables or constants
Hi Thiyaghu,
I have already got the last_insert_id. now I wanna know if there are any
variables or constants to instead of game_log's primary key cos I don't know
its name.
Date: Mon, 1 Feb 2010 14:24:59 +0530
Subject: Re: how to get the name of primary key ?
From:
On 01/02/2010, at 7:33 PM, 曹凯 wrote:
Hi all,
if we just know the table name but don't know the name of primary
key, is there any variables or constants could instead of the PK?
for example:
there is a table game_log, and now I have the last inserted_id
but don't know what its
If you have performance problems, and no slowlog, maybe it just isn't
enabled in your config ?
Your indexes may not have changed, but the size of your data has. A query
that does a full tablescan will run acceptably on a few thousand records,
but be damn slow on a few million - especially as soon
Martijn Tonies wrote:
database. I would also bet that 80% of the people who are actually
writing queries with that many joins don't have a solid grasp of the
fundamental principles of relational database design.
Why not? Normalizing gets you -more- tables, not less.
And normalizing is a
Tom,
I noticed the article didn't say how much money you'll save by not paying
through the nose for Oracle per server licensing, the cost of upgrading
your hardware to get some speed out of Oracle, or the cost of having to
hire one or more Oracle administrators to manage and tweak the database.
hi Jesper,
thanks a lot! That's what I want. thank u againCC: mysql@lists.mysql.com
From: jes...@noggin.com.au
Subject: Re: how to get the name of primary key ?
Date: Mon, 1 Feb 2010 20:26:36 +1100
To: tx...@hotmail.com
On 01/02/2010, at 7:33 PM, 曹凯 wrote:
Hi all,
if we just know the table
Martijn Tonies wrote:
Martijn Tonies wrote:
database. I would also bet that 80% of the people who are actually
writing queries with that many joins don't have a solid grasp of the
fundamental principles of relational database design.
Why not? Normalizing gets you -more- tables, not less.
hi,
I'm a little confused by the
document(http://dev.mysql.com/doc/refman/5.1/en/table-cache.html),
which only says:
To minimize the problem with multiple client sessions having
different states on the same table, the table is opened independently
by each concurrent session.
Are sessions using
u can also get information of table using
use use urdbname
mysqlshow create table game_log \G
2010/2/1 曹凯 tx...@hotmail.com
hi Jesper,
thanks a lot! That's what I want. thank u againCC: mysql@lists.mysql.com
From: jes...@noggin.com.au
Subject: Re: how to get the name of primary key ?
On Mon, Feb 1, 2010 at 2:21 PM, Cui Shijun rancp...@gmail.com wrote:
To minimize the problem with multiple client sessions having
different states on the same table, the table is opened independently
by each concurrent session.
That literally means that every time a table gets referenced, it
Hi All,
Switching from Oracle to MySQL, I seem to be having some difficulty selecting
dates using between or even where = and = like:
SELECT * FROM orders WHERE order_date BETWEEN='2010-01-01' AND '2010-01-30'
ORDER BY order_date;
or
SELECT * FROM orders WHERE order_date ='2010-01-01' AND =
Just trying to help.
SELECT * FROM orders WHERE order_date BETWEEN '2010-01-01' AND
'2010-01-30' ORDER BY order_date;
or
SELECT * FROM orders
WHERE order_date = '2010-01-01' AND = '2010-01-30' ORDER BY
order_date;
From: ML mailingli...@mailnewsrss.com
Hi
What is the datatype of the column order_date. Give the full form of the date
for the between condition.
Thanks
Suresh Kuna
MySQL DBA
--Original Message--
From: ML
To: mysql@lists.mysql.com
Subject: Selecting Dates
Sent: Feb 1, 2010 7:05 AM
Hi All,
Switching from Oracle to MySQL, I
Shouldn't it be:
SELECT * FROM orders WHERE order_date = '2010-01-01' AND order_date =
'2010-01-30' ORDER BY order_date;
?
change the = and repeat the column_name. Datetime should be datetime or
timestamp;
On Mon, Feb 1, 2010 at 8:25 AM, sureshkumar...@gmail.com wrote:
Hi
What is the
All,
I am trying to create an atomic operation in MySQL that will manage a
queue. I want to lock an item from a table for exclusive access by one of
my processing threads. I do this by inserting the unique ID of the record I
want to reserve into my cli_lock table. The following query is what I
For the given table:
FIELD TYPE COLLATION NULL
KEY DEFAULT Extra PRIVILEGES COMMENT
-
-- -- --- --
database. I would also bet that 80% of the people who are actually
writing queries with that many joins don't have a solid grasp of the
fundamental principles of relational database design.
Why not? Normalizing gets you -more- tables, not less.
And normalizing is a goal in itself? I've seen
The query is probably fine.. that is just the lock doing it's job.
Take that advice literally.. when you fail with that class of
exception, delay a milli-second or two and retry. For a large PHP
site I designed, we had that behaviour built-in: up to three attempts
waits 5, then 10 ms between
Oracle will sell it if they can convince the customer.
Any one who has had the pleasure of using Oracle Application Server
can attest to that.
--
- michael dykman
- mdyk...@gmail.com
May the Source be with you.
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
Jim,
Shouldn't it be:
SELECT * FROM orders WHERE order_date = '2010-01-01' AND order_date =
'2010-01-30' ORDER BY order_date;
?
change the = and repeat the column_name. Datetime should be datetime or
timestamp;
Spot on. Thank you for the clarification, obviously a syntax mistake on
First things first: You *are* on InnoDB, which has row-level locking instead
of table-level ?
On Mon, Feb 1, 2010 at 4:08 PM, Michael Dykman mdyk...@gmail.com wrote:
The query is probably fine.. that is just the lock doing it's job.
Take that advice literally.. when you fail with that class
hi,
This post( http://bugs.mysql.com/bug.php?id=48929 ) shows that If
the number of opened file grows too big, mysql will get error.
I'm also confused by the difference relationship between open
table and open file descriptor by the table cache.
As far as I understand, when a thread ask the
Jerry Schwartz wrote:
From: Wagner Bianchi [mailto:wagnerbianch...@gmail.com]
Sent: Thursday, January 28, 2010 2:03 PM
To: Jerry Schwartz
Subject: Re: WAMP vs LAMP
[JS] The file paths were all the same, actually, and the address for MySQL is
just “localhost”.
[WB]Consider to use MySQL on
Regards,
Jerry Schwartz
The Infoshop by Global Information Incorporated
195 Farmington Ave.
Farmington, CT 06032
860.674.8796 / FAX: 860.674.8341
www.the-infoshop.com
From: Wagner Bianchi [mailto:wagnerbianch...@gmail.com]
Sent: Friday, January 29, 2010 5:49 PM
To: Jerry
On Mon, Feb 1, 2010 at 4:51 PM, Cui Shijun rancp...@gmail.com wrote:
I'm also confused by the difference relationship between open
table and open file descriptor by the table cache.
open table is a MySQL concept. Open file descriptor is an OS concept. A
single table (MyISAM) consists of
Thanks for the clarification. As I understand it, the syntax on the client end
is to use . as the host name.
I was using localhost on the LAMP configuration, and never bothered to
change it. With 7 or so web-based users, there isn't much rush.
Regards,
Jerry Schwartz
The Infoshop by Global
Got your idea.
Thank you very much. Now I know how table cache works :-)
For the bug, yes, it's related to the value of FD_SETSIZE, which is
limited to 1024 at my RedHat box.
Maybe I should update it to a suitable value.
2010/2/2 Johan De Meersman vegiv...@tuxera.be:
On Mon, Feb 1, 2010
Is FD_SETSIZE regards to an open_file_limit?
WB
2010/2/1 Cui Shijun rancp...@gmail.com
Got your idea.
Thank you very much. Now I know how table cache works :-)
For the bug, yes, it's related to the value of FD_SETSIZE, which is
limited to 1024 at my RedHat box.
Maybe I should update it
Sorry, *open_files_limit...
2010/2/1 Wagner Bianchi wagnerbianch...@gmail.com
Is FD_SETSIZE regards to an open_file_limit?
WB
2010/2/1 Cui Shijun rancp...@gmail.com
Got your idea.
Thank you very much. Now I know how table cache works :-)
For the bug, yes, it's related to the value
Johan De Meersman wrote:
First things first: You *are* on InnoDB, which has row-level locking
instead of table-level ?
Yes, both cli_lock and queue tables are InnoDB. The server is
running MySQL 5.1.36.
I find it strange that I would have so many of these deadlocks
throughout a day when
FD_SETSIZE is defined at /usr/include/linux/posix_types.h and
/usr/include/bits/typesizes.h ...
Set open_files_limit bigger is a way to let mysql use more file
descriptors( and thus has the chance to reach the FD_SETSIZE limit )
Also notice in the bug description, innodb_open_files was used,
Michael Dykman wrote:
The query is probably fine.. that is just the lock doing it's job.
Take that advice literally.. when you fail with that class of
exception, delay a milli-second or two and retry. For a large PHP
site I designed, we had that behaviour built-in: up to three attempts
waits
The SELECT FOR UPDATE is supposed to lock those rows selected.. an
operation in another connection attempting to read or modify those
rows gets an error on the lock if it is still in place. That is that
SELECT FOR UPDATE is supposed to do.
If that is not the behaviour you want, then why are
Try to run
SHOW ENGINE INNODB STATUS;
Near the top there will be some information on the latest deadlock.
That might help you to understand what is deadlocking. Sometimes
changing the query or changing the indexes can remove the condition
that causes the deadlock. I don't know whether you
May I suggest this link? I found it useful. I haven't looked but there
may be more recent posts with additional information.
http://www.xaprb.com/blog/2007/09/18/how-to-debug-innodb-lock-waits/
Donna
From:
Jesper Wisborg Krogh jes...@noggin.com.au
To:
mysql@lists.mysql.com
Date:
Hi, I'm very new to this and I need help.
What I want to do is to execute a source command statement from cmd to create
tables and populate them on a data base that I created in Mysql. Here is what
I did at CMD:
*I changed the directory from c:\ to mysql
*At mysql prompt i used -u root -p that
How did you type the source command? Did you remember not to quote the file
name? E.g.
mysql SOURCE schema.sql
is the correct way.
Jesper
On Tue, 2 Feb 2010 10:38:08 kebede teferi wrote:
Hi, I'm very new to this and I need help.
What I want to do is to execute a source command statement
On 02/01/2010 06:38 PM, kebede teferi wrote:
Hi, I'm very new to this and I need help.
What I want to do is to execute a source command statement from cmd to create
tables and populate them on a data base that I created in Mysql. Here is what
I did at CMD:
*I changed the directory from c:\
Error 2 is No such file or directory
So, probably the file is not in the right path or you need to explicitly
provide the path to the file.
Carlos
On 2/1/2010 5:38 PM, kebede teferi wrote:
Hi, I'm very new to this and I need help.
What I want to do is to execute a source command
what everyone else said... also, is there a longer version of the error? or is
it literally error 2
or error 22?
Colin
On February 1, 2010 06:38:08 pm kebede teferi wrote:
Hi, I'm very new to this and I need help.
What I want to do is to execute a source command statement from cmd to
Give the ful path of file name with in '' and try it out
Thanks
Suresh Kuna
MySQL DBA
--Original Message--
From: Colin Streicher
To: mysql@lists.mysql.com
Cc: kebede teferi
ReplyTo: co...@obviouslymalicious.com
Subject: Re: I NEED HELP ON 'SOURCE(\.) MYSQL
Sent: Feb 2, 2010 7:33 AM
what
I thank you all who responded to solve my problem in using the source command
to execute a mysql script saved on a notepad. Thank you, for your tips, I've
solved the problem. When I was using the \.create.sql at the prompt I wasn't
giving the full path where 'create.sql' is residing. Once I
hi to all..
i was in need to take backup of database..
i am using sql server version:5.0.27-coomunity-nt
i have tried by using
mysqldump -u name -p password database_name backup.sql;
but i am getting error.. i am using windows xp system.. please help me
Please paste the error and don't give the spave between -p and password.
On Tue, Feb 2, 2010 at 12:05 PM, muralikrishna g
muralikrishn...@gmail.comwrote:
hi to all..
i was in need to take backup of database..
i am using sql server version:5.0.27-coomunity-nt
i have tried by using
mysqldump
hi to all..
i was in need to take backup of database..
i am using sql server version:5.0.27-coomunity-nt
i have tried by using
mysqldump -u name -p password database_name backup.sql;
but i am getting error.. i am using windows xp system..
please help me
mysql mysqldump -u root -p dbadmin murali
Hi Murali,
You have to execute it outside mysql prompt i.e command prompt.
Thanks
Suresh Kuna
MySQL DBA
Sent from BlackBerry® on Airtel
-Original Message-
From: muralikrishna g muralikrishn...@gmail.com
Date: Tue, 2 Feb 2010 12:17:24
To: Suresh Kunasureshkumar...@gmail.com
Cc:
Hey guys
Try using this option from the command prompt via run
Mysqldump.exe -u root -p --all-database backup.txt
This should work.
Thanks,
Dilipkumar
Database Engineering
phone: +91-44-6637 3167
mailto: dilipkumar.par...@eds.com
Pager mail:9884430...@nma.vodafone.in
-Original
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