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Full Discussion: mysql query in shellscript
Top Forums Shell Programming and Scripting mysql query in shellscript Post 302583313 by aish11 on Tuesday 20th of December 2011 06:25:19 AM
Old 12-20-2011
Code:
mysql> desc indata;
+--------------+---------------------+------+-----+---------+-------+
| Field        | Type                | Null | Key | Default | Extra |
+--------------+---------------------+------+-----+---------+-------+
| MDate   | date                | NO   | PRI | NULL    |       |
| OPrice | double              | NO   |     | 0       |       |
| CPrice | double              | NO   |     | 0       |       |
| Volume | double              | NO   |     | 0       |       |
| ADV          | bigint(20) unsigned | NO   |     | 0       |       |
| InID | int(20) unsigned    | NO   | PRI | NULL    |       |
+--------------+---------------------+------+-----+---------+-------+



sorry its MDate

---------- Post updated at 06:25 AM ---------- Previous update was at 06:23 AM ----------

Quote:
Originally Posted by radoulov
You could use either:

Code:
select adv 
from indata
where inid = '$INSTRUID'
and Date = ( 
    select max(Date) 
    from indata
    where inidi = '$INSTRUID'
    limit 1
    )
limit 1;

Or:

Code:
select a.adv
from indata a
join (
  select inid, max(Date) Date    
  from indata 
  where inid = '$INSTRUID' 
  group by inid
   ) b
  on a.inid =  b.inid
  and a.Date = b.Date
  where a.inid = '$INSTRUID'
  limit 1
  ;

I've added the limit clause for safety (not knowing your table structure and data, it's impossible to know if duplicates are possible).

thanks radoulov but can i get any shorcut code??
 

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LEARN ABOUT CENTOS

mysql_tzinfo_to_sql

MYSQL_TZINFO_TO_S(1)					       MySQL Database System					      MYSQL_TZINFO_TO_S(1)

NAME

       mysql_tzinfo_to_sql - load the time zone tables

SYNOPSIS

       mysql_tzinfo_to_sql arguments

DESCRIPTION

       The mysql_tzinfo_to_sql program loads the time zone tables in the mysql database. It is used on systems that have a zoneinfo database (the
       set of files describing time zones). Examples of such systems are Linux, FreeBSD, Solaris, and Mac OS X. One likely location for these
       files is the /usr/share/zoneinfo directory (/usr/share/lib/zoneinfo on Solaris). If your system does not have a zoneinfo database, you can
       use the downloadable package described in Section 9.6, "MySQL Server Time Zone Support".

       mysql_tzinfo_to_sql can be invoked several ways:

	   shell> mysql_tzinfo_to_sql tz_dir
	   shell> mysql_tzinfo_to_sql tz_file tz_name
	   shell> mysql_tzinfo_to_sql --leap tz_file

       For the first invocation syntax, pass the zoneinfo directory path name to mysql_tzinfo_to_sql and send the output into the mysql program.
       For example:

	   shell> mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql

       mysql_tzinfo_to_sql reads your system's time zone files and generates SQL statements from them.	mysql processes those statements to load
       the time zone tables.

       The second syntax causes mysql_tzinfo_to_sql to load a single time zone file tz_file that corresponds to a time zone name tz_name:

	   shell> mysql_tzinfo_to_sql tz_file tz_name | mysql -u root mysql

       If your time zone needs to account for leap seconds, invoke mysql_tzinfo_to_sql using the third syntax, which initializes the leap second
       information.  tz_file is the name of your time zone file:

	   shell> mysql_tzinfo_to_sql --leap tz_file | mysql -u root mysql

       After running mysql_tzinfo_to_sql, it is best to restart the server so that it does not continue to use any previously cached time zone
       data.

COPYRIGHT

       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.

       This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
       published by the Free Software Foundation; version 2 of the License.

       This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO

       For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
       at http://dev.mysql.com/doc/.

AUTHOR

       Sun Microsystems, Inc. (http://www.mysql.com/).

MySQL 5.1							    04/06/2010						      MYSQL_TZINFO_TO_S(1)
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