Chris, take a look at Federated tables
https://dev.mysql.com/doc/refman/5.5/en/federated-storage-engine.html
No, it is not as easy as Oracle's dblinks.
David.
David Lerer | Director, Database Administration | Interactive | 605 Third
Avenue, 12th Floor, New York, NY 10158
Direct: (646) 487-6522
not in (Select min (B.id) from icd9x10 B
group by B.icd9, B.icd10).
I have not tested it (sorry it is a weekend here...), but I hope it will lead
you into the right direction.
David.
David Lerer | Director, Database Administration | Interactive | 605 Third
Avenue, 12th Floor, New York, NY 10158
Thanks Shawn, This may work for us with some script changes. We'll take a look.
By the way, too bad we cannot rename a database, or can we?
See http://dev.mysql.com/doc/refman/5.1/en/rename-database.html about removal
of a dangerous RENMAE DATABASE statement...
David.
David Lerer | Director
that it will be a perfect match (object wise) to production.
Is there an easy way to lock the whole database for the duration of the import
- so that no developers can update the database?
Obviously, I can revoke permissions, but I was wondering whether there is a
better approach.
Thanks, David.
David Lerer
that it will be a perfect match (object wise) to production.
Is there an easy way to lock the whole database for the duration of the import
- so that no developers can update the database?
Obviously, I can revoke permissions, but I was wondering whether there is a
better approach.
Thanks, David.
David Lerer
Thanks Wayne. This a great idea to prevent user activity on the server. I’ll
use it in the future.
But I’m looking for a way to prevent user activity on a database ((i.e.
database being a schema or a catalogue).
David.
David Lerer | Director, Database Administration | Interactive
We have tried Oracle tool (MySQL Enterprise Monitor) which allows you to
capture and analyze queries submitted from selected hosts, for a specific time
window. The tool and its user interface were very useful in identifying the
volume and heavy queries. Licensing and (cost) may be an issue. I
Thanks Shawn. Very informative and useful. David.
The information contained in this e-mail and any attached
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disclosure. If you are not the intended recipient you may not
read, copy, distribute or use this information. If you have
Thanks Shawn. This is very useful.
Could you shed some light on how rolled-back transactions (or not-yet-committed
transactions for that matter) are treated as far as the binary logs? Are these
updates actually go to the binary logs, thus trigger replication to the salve?
Thanks, David.
Cabbar, try to replace the IN subquery with an EXISTS. Something like:
SELECT * FROM A WHERE EXISTS (SELECT * FROM B WHERE A.id=B.A_ID and B.name
like 'X%');
Does it help?
David.
-Original Message-
From: Cabbar Duzayak [mailto:cab...@gmail.com]
Sent: Friday, July 06, 2012 11:46 AM
Dante, consider using views that are defined with your alternate column names
and present the application with these views rather than underlying table names.
David.
-Original Message-
From: D. Dante Lorenso [mailto:da...@lorenso.com]
Sent: Friday, May 18, 2012 5:22 PM
To:
Alternatively, you could use MySQL Enterprise Monitor (Oracle) and capture the
queries for very easy analysis.
I have found it very effective, especially when you have very high number of
queries per second.
I have not noticed any impact on database performance.
David.
-Original
Going on a limb here...: I believe I have occurred similar issue (i.e. two
transactions go into an indefinite wait).Though, very infrequent
occurrence.
My only explanation at that time was that there is some loophole when the
deletes/inserts had some impact also on the table indexes. In
Alternatively, you could use MySQL Enterprise Monitor (Oracle) and capture the
queries for very easy analysis.
I have found it very effective, especially when you have very high number of
queries per second.
In turning on this capture, I have not noticed any impact on database
performance.
As a follow up question, will it be ok to do the following:
1. mysqldump -hmysql-inst2 mysql
2. Backup mysql-inst1 and use the backup to restore to mysql-inst2
3. mysql -hmysql-inst2 mysql
This way I hope to be able to refresh a DEV instance from a PROD database, but
preserve the permissions,
To: David Lerer; Baron Schwartz; MySql
Subject: RE: how to sync mysql.user table between to two mysql instances
Hello David,
Precisely, that's what my problem is. The users found in mysqlinst1 are not in
mysqlinst2. There are about 30 users defined in inst1 and only 4 in inst2. I
would like to sync
Have you tried to set city = null (i.e. without the quotes)? David.
-Original Message-
From: Richard Reina [mailto:gatorre...@gmail.com]
Sent: Friday, March 09, 2012 4:24 PM
To: mysql@lists.mysql.com
Subject: query problem with null
When I do the following query:
SELECT * FROM
Try with a combination of functions LOCATE and SUBSTR.
Locate will return the positions for WordA and WordB within the original text,
and, SUBSTR will allow you to string what you you need all together.
David.
On Thu, Mar 8, 2012 at 4:11 PM, Hank hes...@gmail.com wrote:
I have a simple
What version do you use? David.
-Original Message-
From: Viacheslav Biriukov [mailto:v.v.biriu...@gmail.com]
Sent: Monday, November 28, 2011 7:09 AM
To: mysql@lists.mysql.com
Subject: Read_only and InnoDB transactions
Hi all.
From the Mysql Documentation:
If you attempt to enable
Biriukov [mailto:v.v.biriu...@gmail.com]
Sent: Monday, November 28, 2011 9:20 AM
To: David Lerer
Cc: mysql@lists.mysql.com
Subject: Re: Read_only and InnoDB transactions
MySQL Community Server 5.1.59 on the Centos 5.7
2011/11/28 David Lerer dle...@us.univision.commailto:dle...@us.univision.com
What
Thanks Bier. I see what you mean.
(As a rule we always use SQL SECURITY INVOKER)
David.
-Original Message-
From: Johan De Meersman [mailto:vegiv...@tuxera.be]
Sent: Thursday, August 18, 2011 4:20 AM
To: David Lerer
Cc: mysql@lists.mysql.com
Subject: Re: Concerned : Developer getting
Correct me if I am wrong, but my impression is that usage of
DEFINER=user in stored procedures has no impact on runtime and is
actually optional.
(not to be confused with the clause SQL SECURITY INVOKER which is
crucial.)
Note: I use 5.1.32-enterprise-gpl-advanced-log.
David.
--
MySQL General
I join you Arthur. That Hungarian notation is despicable (though I love
listening to that language, it is different).
I don't find it necessary for a column name to tell me its type.
But I do like the ability to have all database objects (table, column, trigger,
index, fk, views, procedures,
I agree. I use the same column name in all tables where it has the same
function - but I consistently add a suffix or prefix. And yes, it is the
old fashion way David.
-Original Message-
From: h...@tbbs.net [mailto:h...@tbbs.net]
Sent: Thursday, August 04, 2011 8:26 AM
To:
I rarely use aliases (unless rarely required in self-join queries).
When I have that option, I create unique columns by prefixing every
table (and its objects) with a number.
Something like:
Create table T1234_Employee
(C1234_Employee_id number(5),
C1234_employee_status char(1)...)
Index
Hard to tell. It depends on the cardinality of tables' id (I assume the
IDs are not unique in each of the tables). David.
-Original Message-
From: Shawn Green (MySQL) [mailto:shawn.l.gr...@oracle.com]
Sent: Tuesday, August 02, 2011 2:47 PM
To: Adarsh Sharma
Cc: mysql@lists.mysql.com
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