Hi,
just Start here http://dev.mysql.com/doc/mysql/en/select.html
mathias
Selon Octavian Rasnita [EMAIL PROTECTED]:
Hi,
I have the following tables:
create table articles(
id int unsigned not null primary key,
title varchar(255) not null,
body text not null
);
create table
Hi,
This applies to 4.1.10 on Solaris 8, with 1 GB of RAM.
Our internal customer wants to be able to make 1000 concurrent
connections to our database, with a mix of MyISAM and InnoDB tables, but
according to http://dev.mysql.com/doc/mysql/en/table-cache.html and an
online Solaris reference
Hi
i like to imit te number of process at startup:
/usr/sbin/mysqld --basedir=/ --datadir=/var/lib/
but i couldn t find the option
thx all
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Hi
i like to imit te number of process at startup:
/usr/sbin/mysqld --basedir=/ --datadir=/var/lib/
but i couldn t find the option
thx all
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Dear All,
I'm new into mysql and has been encountering huge problem in
connecting to the database from the c application. The code execute
with an error message :
Failed to connect to database: Error:
Client does not support authentication protocol requested by server;
consider upgrading MySQL
(sorry for my english)
hello people:
i want to answer if do exists any mysql solution that implements load
balancer and redundancy between 'application layer' and 'mysqld layer'
i will try to explain me:
i want to implement a completed mysql cluster system, and the
documentation is very
I was trying to analyze a query that was taking almost 4 seconds to
execute. While trying to create additional indexes - found that the
query is not using any index from table qb_test_result . The type
returned is ALL for qb_test_result .
I have given the tables and query below. It would have
hello people:
im very interested about the limitations and hardware features support.
for example:
software limitation:
how much rows does a table can to have?
how much size of a database does mysql support?
...
hardware features support:
has mysql multi-processor support? how much processors?
Hi,
have you created an index on (id, testId) ?
i can't see the other indexes ? The only ones are the PK and testStudent, so the
PK is used.
Mathias
Selon Sajith A [EMAIL PROTECTED]:
I was trying to analyze a query that was taking almost 4 seconds to
execute. While trying to create additional
Trying to run exilog as part of the EXIM mta but getting a mysql error
both when i run from command line and as part of apache
CL
/usr/lib/perl5/site_perl/5.8.5/x86_64-linux/auto/DBD/mysql/mysql.so:
undefined symbol: mysql_init
apache error log
/usr/bin/perl: symbol lookup error:
From: d2clon
im very interested about the limitations and hardware features support.
for example:
software limitation:
how much rows does a table can to have?
how much size of a database does mysql support?
These depend on the version of MySQL and the OS
The number of rows is virtually
Thank you Mathias for your time...
have you created an index on (id, testId) ?
i can't see the other indexes ? The only ones are the PK and testStudent, so
the
PK is used.
Yes i also tried that .. but it was not getting used.. it listed as
the possible_keys PRIMARY and testStudent but the
Hi Sajith,
I tried to recreate you tables and do some tests, but i don't have significant
data. So i don't take your explain plan.
I suggest you to test after optimize table ... and analyze table ...
if you stay with the problem and you can give me a set of data, i'll try to help
more.
Mathias
i've googled and the only answer to problems like this has been to
reinstall the DB perl module. Ive tried this but still get same error.
any clues???
thanks in advance.
Ronan
Is libmysqlclient.so available in one of your LD_LIBRARY_PATH directory ?
--
Philippe Poelvoorde
COS Trading
Philippe Poelvoorde wrote:
i've googled and the only answer to problems like this has been to
reinstall the DB perl module. Ive tried this but still get same error.
any clues???
thanks in advance.
Ronan
Is libmysqlclient.so available in one of your LD_LIBRARY_PATH directory ?
thanks
Hi Danny,
Thank you for helping me here.
Yes, I am aware of need to have the space between --host=xxx and
--user=xxx, and command I am executing actually has a space.
It looks like you believe that my problems related to security of remote
logon. That is something, I am going to investigate
Sajith A wrote:
EXPLAIN SELECT qb_test_result.id resultId, qb_question.testId AS
testId, qb_test.title testName, qb_question.marks, qb_test.passrate,
qb_test_result.marks testMark, qb_test_result.percentage
testPercentage, qb_test_result.startTime, qb_test_result.endTime,
qb_test_result.status
Octavian,
You seem to be missing an articles column linking it to newspapers.
Supposing an id_newspapers column in articles, your query would be
something like
SELECT
articles.title,
CHAR_LENGTH(body) AS Length,
newspapers.name AS Newspaper,
COUNT(visitors.id) AS Visits,
I have two mysql boxes setup. Fast machines, I think they are dual 3ghz with
boat loads of ram. They are not real busy servers but they have some pretty
good sized tables, one of them with a few million rows.
My question is, I have Nagios setup to monitor the seconds behind master on the
Hello.
I don't know such an option. However, in my opinion, max_connections
variable could be helpful. See:
http://dev.mysql.com/doc/mysql/en/server-system-variables.html
[EMAIL PROTECTED] wrote:
Hi
i like to imit te number of process at startup:
/usr/sbin/mysqld --basedir=/
Hello.
I don't have enough experience with Solaris.. But on most Unixes your could
change
the limit of file descriptors for process, not for whole system.
See:
http://dev.mysql.com/doc/mysql/en/not-enough-file-handles.html
Martijn van den Burg [EMAIL PROTECTED] wrote:
Hi,
yes it is
im still getting the mysql_init error...
what is this usually indicataive of?? a build issue?? PATHs?? config file??
Im using the standard 'came with distribution' MySQL from SLAMD 10.1...
I've got no idea what is this distribution (Mandrake Linux for AMD 64?)
what is strange is
Berman, Mikhail wrote:
Hi Danny,
Thank you for helping me here.
Yes, I am aware of need to have the space between --host=xxx and
--user=xxx, and command I am executing actually has a space.
It looks like you believe that my problems related to security of remote
logon. That is something, I am
[EMAIL PROTECTED] wrote:
Hi,
have you created an index on (id, testId) ?
i can't see the other indexes ? The only ones are the PK and testStudent, so the
PK is used.
The PK is not used, nor should it be. Look at the EXPLAIN output.
Let me rewrite the query with explicit joins, and reformat
I guess this is a problem with the version of the C client Libraries
that you are using, because of the way 4.1.x version of mysql stores
the hash value of the password using the PASSWORD( ) function, so when
you are giving the password embedded in the C code, may be the server
does not match it
I'm working on fine tuning the Server Parameters for a
machine (with 2 GB of RAM). The database has a fair
number of tables. Many of them are full of blobs. The
version of our production MySQL is:
4.0.20-pc-linux-i686.
In trying to decide on some of the buffer variables
I've seen some very
Yes you are right, these are Thread specific settings, leave them at
1M or 2M, atleast that's what I set on our productions systems, else
you risk at running out of memory under high loads, and it works
great, the other parameters as cited in the book High performance
Mysql , by Jeremy Zawodny
Since I can't get the book until this evening ...
In most sample my.cnf files online I see the following
setup:
[myisamchk]
key_buffer = 64M
sort_buffer = 64M
read_buffer=16M
write_buffer = 16M
If these are per thread -- aren't they a bit high?
thanks.
erin
--- Kishore Jalleda [EMAIL
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
How would I add a comment to rows in an existing table, if I am not
changing the row definition?
This is for mysql 4.1 and 5.0.
Thanx.
- --
Love is mutual self-giving that ends in self-recovery. Fulton Sheen
James Black[EMAIL PROTECTED]
James Black [EMAIL PROTECTED] wrote on 06/23/2005 03:41:32 PM:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
How would I add a comment to rows in an existing table, if I am not
changing the row definition?
This is for mysql 4.1 and 5.0.
Thanx.
- --
Love is mutual self-giving that ends
Selon Michael Stassen [EMAIL PROTECTED]:
The PK is not used, nor should it be. Look at the EXPLAIN output.
Hi,
i hate the confusion people do between the primary key and the automatic index
on the PK.
Primary key is a generic concept for all databases. It assumes unicity and
managed data
What type of drives to you have on your system? That is often more
important than CPU speed. My guess is that there are nightly maintenance
crons slowing down disk access.
I have never monitored replication via the seconds-behind-master function
as we do not use 4.1, so I can't speak for how
Yes they are very high, also key_buffer_size is a global parameter
shared by all threads, it is recommended to be around 25% of your RAM,
I would suggest since you have 2GB ram the following
key_buffer_size = 500M ( greatly improves speed )
sort_buffer_size= 2M
read_buffer_size=2M
Hey All-
Got a fun question - I hit the manual but not much luck on my question. I
want to combine 2 fields and then search them
SELECT first_name, lastname FROM user WHERE CONCAT(first_name, ' ',
last_name) LIKE '%$user%'
Does this make sense? The CONCAT function was the closest I found to
Hi everyone,
I just subscribed to the list and some of the articles
are very helpful. I'm facing some problem on my mysql
database server.
One of our Raid drives crashed and we had to backup
the whole data to another drive (only files), we did
no mysqldump. Now I want to restore a certain
select first_name, lastname from user where
first_name like '%$user%'
or
last_name like '%$user%'
;
--- Matt Babineau [EMAIL PROTECTED] wrote:
Hey All-
Got a fun question - I hit the manual but not much
luck on my question. I
want to combine 2 fields and then search them
SELECT
Hi,
what's your version ? in 4.11 the two forms work :
mysql select concat(firstname,' ','lastname') from names;
+--+
| concat(firstname,' ','lastname') |
+--+
| Jean lastname|
+--+
sorry for the first select (bad copy of a string 'lastname'):
mysql select concat(firstname,' ',lastname) from names where concat(firstname,'
',lastname) like 'Jean Dupond%';
++
| concat(firstname,' ',lastname) |
++
| Jean Dupond
I don't think network latency would be an issue. This is within a protected
network dmz so it has it's own switch.
Here is the nagios script stuff. Might be more than what you need but let me
know if you are able to use some of it.
I have two on the server. first, I have:
[EMAIL
the substring will only work as long as you don't have spaces in the first
and last name columns
'Billy Ray' Smith and John 'Von Hoenhiem' would cause problems
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 23, 2005 4:05 PM
To: Matt Babineau
Cc:
Hello,
We are running mySQL 3.23.58 on a RedHat server. We have a database
that needs to store Chinese (big5) and Vietnamese (Unicode-8 should
work)how do I get it to store alternative character sets? The
docs online only relate to ver 4so the character set attribute
doesn't work.
yes in therory. But practicaly, you always have business rules and data
knowledge without what you can do nothing.
so the substring must be constructed according to data.
Mathias
Selon Ben Kutsch [EMAIL PROTECTED]:
the substring will only work as long as you don't have spaces in the first
I have two servers doing replication for logs. When I do extended insert
syntax on the master to combine multiple log entries, the slave complains
about duplicate primary key numbers, even though my inserts don't set the
primary key and the primary key is auto_increment.
So any time I use
Thanks for the help, I'll give some of these examples a try~!!!
Thanks,
Matt Babineau
Criticalcode
858.733.0160
[EMAIL PROTECTED]
http://www.criticalcode.com
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Hi,
this is a perl script converter for inserts to simple form. if you work from a
mysqldump, you can try it to see if the converted inserts do not genrate errors
:
http://platon.sk/cvs/cvs.php/scripts/perl/mysql/mysqldump-convert.pl
Mathias
Selon Jeremiah Gowdy [EMAIL PROTECTED]:
I have two
The inserts succeed on the master, so the problem isn't my SQL syntax. They
are legal extended inserts. It's just that the replication slave seems to
insert them out of order and screw up the auto-increment primary key.
- Original Message -
From: [EMAIL PROTECTED]
To: Jeremiah
see this for troubleshootings :
http://sunsite.mff.cuni.cz/MIRRORS/ftp.mysql.com/doc/en/Replication_Problems.html
hope that helps
Mathias
Selon Jeremiah Gowdy [EMAIL PROTECTED]:
The inserts succeed on the master, so the problem isn't my SQL syntax. They
are legal extended inserts. It's
Hello.
I've compiled your code using libraries and includes from
MySQL-4.1.6 (yes, my testing environment isn'tperfect :) and
successfully connected to MySQL-4.1.10. Old passwords was off,
so I used a 4.1. authorization protocol.
Elizabeth Bonifacio [EMAIL PROTECTED] wrote:
Dear All,
Hello.
I haven't heard about periodical MySQL jobs, but Unix boxes usually have
some midnight cron jobs (updating of locate database for example).
[EMAIL PROTECTED] wrote:
I have two mysql boxes setup. Fast machines, I think they are dual 3ghz with
boat loads of ram. They are
Can anyone advise please, tried binary installation but other users have
reported encountering similar problems so I thought I'd try a source
installation.
Adjusted the pentiumpro flags out and configure reported no errors -when I
use make I get *** no targets. stop.
The makefile is in there, am
I do this all the time and it works flawlessly. Just like your example and even
more extreme. I use this technique to provide search mechamisms for my
applications. ex,
SELECT ID
FROM table
WHERE concat(field1, field2, field3,...{all the fields in the table}) Like
'%searchstring%';
This
Hi,
I am using MySql on Mac OS X.
I am wondering if I could execute a command (shell, perl) by a Trigger.
I read the manual and it seems this is impossible.
ted
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While the query WHERE expr LIKE '%$user%' works without fail, it can
not use an index, and thus on large tables will be exceedingly slow.
mysql explain select last, first from users where concat(last,first)
like '%user%'\G
*** 1. row ***
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