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Top Forums Shell Programming and Scripting To get max/min Date/Timestamp from a file Post 302530772 by kumaran_5555 on Wednesday 15th of June 2011 02:47:38 AM
Old 06-15-2011
This code should work for you

If your seperator is pipe instead of comma use replace the dot with pipe inside -F"[-,:. ]"

Code:
awk -F"[-,:. ]" '

BEGIN{
min_date="99999999"
min_ext="99999999999999999999"

}
{
date=$2$3$4; ext=$5$6$7$8$9$10$11; 
if(min_date>date){min_date=date}; 
if(max_date<date){max_date=date};
if(min_ext>ext){min_ext=ext}
if(max_ext<ext){max_ext=ext}
}


END{

print "min date "min_date
print "max date " max_date
print "min ext "min_ext
print "max ext "max_ext
}' test.txt

Your sample file isn't matching the initial sample given here. may be few changes has to be done.

Last edited by kumaran_5555; 06-15-2011 at 04:11 AM..
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GMDATE(3)								 1								 GMDATE(3)

gmdate - Format a GMT/UTC date/time

SYNOPSIS
string gmdate (string $format, [int $timestamp = time()]) DESCRIPTION
Identical to the date(3) function except that the time returned is Greenwich Mean Time (GMT). PARAMETERS
o $format - The format of the outputted date string. See the formatting options for the date(3) function. o $timestamp - The optional $timestamp parameter is an integer Unix timestamp that defaults to the current local time if a $timestamp is not given. In other words, it defaults to the value of time(3). RETURN VALUES
Returns a formatted date string. If a non-numeric value is used for $timestamp, FALSE is returned and an E_WARNING level error is emitted. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | The valid range of a timestamp is typically from | | | Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 | | | 03:14:07 GMT. (These are the dates that corre- | | | spond to the minimum and maximum values for a | | | 32-bit signed integer). However, before PHP 5.1.0 | | | this range was limited from 01-01-1970 to | | | 19-01-2038 on some systems (e.g. Windows). | | | | | 5.1.1 | | | | | | | There are useful constants of standard date/time | | | formats that can be used to specify the $format | | | parameter. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 gmdate(3) example When run in Finland (GMT +0200), the first line below prints "Jan 01 1998 00:00:00", while the second prints "Dec 31 1997 22:00:00". <?php echo date("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); echo gmdate("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); ?> SEE ALSO
date(3), mktime(3), gmmktime(3), strftime(3). PHP Documentation Group GMDATE(3)
All times are GMT -4. The time now is 09:36 AM.
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