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Full Discussion: Complex MySQL Query(s)
Top Forums Web Development Complex MySQL Query(s) Post 302453641 by STOIE on Thursday 16th of September 2010 01:28:41 AM
Old 09-16-2010
How about this:

Code:
select id, pid, name (SELECT max(saved) WHERE pid = 2.pid) AS max_date, (SELECT min(saved) WHERE pid = 2.pid) as min_date  
	from property property1
	where saved = (select max(saved) from property where pid = property1.pid)
	ORDER BY max_date;

Does this sound better...?

Bear in mind this is from an oracle guru...
Anyway, will check this out when I get home and have a db to play around with.

@ NEO
I am sure I could do that, but really wanted to package it neatly into a query.
Programming is being done in PERL
Last edited by Neo; 09-16-2010 at 02:32 AM.. Reason: cod tags
 

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LEARN ABOUT CENTOS

pmdamysql

PMDAMYSQL(1)						       Performance Co-Pilot						      PMDAMYSQL(1)

NAME

       pmdamysql - MySQL database PMDA

DESCRIPTION

       pmdamysql is a Performance Co-Pilot PMDA which extracts live performance data from a running MySQL database.

INSTALLATION

       pmdamysql uses a configuration file from (in this order):

       o   /etc/pcpdbi.conf

       o   $PCP_PMDAS_DIR/mysql/mysql.conf

       This file can contain overridden values (Perl code) for the settings listed at the start of pmdamysql.pl, namely:

       o   database name (see DBI(3) for details)

       o   database user name

       o   database pass word

       Once this is setup, you can access the names and values for the mysql performance metrics by doing the following as root:

	       # cd $PCP_PMDAS_DIR/mysql
	       # ./Install

       If you want to undo the installation, do the following as root:

	       # cd $PCP_PMDAS_DIR/mysql
	       # ./Remove

       pmdamysql is launched by pmcd(1) and should never be executed directly.	The Install and Remove scripts notify pmcd(1) when the agent is
       installed or removed.

Binary Status values in text
       Some of the status values are in the form of YES/NO or ON/OFF.

       Since these cannot be intepreted by tools like PMIE, they have been duplicated with a _num extension and the values of 1 (YES/ON) or 0
       (NO/OFF).

   Eg:
       o   mysql.slave_status.slave_io_running

       o   mysql.slave_status.slave_io_running_num

FILES

       /etc/pcpdbi.conf
	   configuration file for all PCP database monitors

       $PCP_PMDAS_DIR/mysql/mysql.conf
	   configuration file for pmdamysql

       $PCP_PMDAS_DIR/mysql/Install
	   installation script for the pmdamysql agent

       $PCP_PMDAS_DIR/mysql/Remove
	   undo installation script for the pmdamysql agent

       $PCP_LOG_DIR/pmcd/mysql.log
	   default log file for error messages from pmdamysql

SEE ALSO

       pmcd(1), pmdadbping.pl(1) and DBI(3).  # vi: sw=4 ts=4 et:

3.8.10							       Performance Co-Pilot						      PMDAMYSQL(1)
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