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Full Discussion: Compare date bash script
Top Forums UNIX for Beginners Questions & Answers Compare date bash script Post 303041980 by Neo on Tuesday 10th of December 2019 08:40:39 AM
Old 12-10-2019
Yeah, that is your "problem"

You store the date and time as a formatted datetime string.

This creates a mess.

It is best to store all your dates (as I said) as an integer(11) not a string but since you are storing as a datetime string, that's OK... you can deal with this easily:

The first thing you need to do is to convert that datetime string to a unix timestamp, for example (like this):

Code:
query="select UNIX_TIMESTAMP( 'YOUR DATETIME STRING HERE') FROM TemperatureLOG order by TimeLog DESC LIMIT 1;"

I did not test it, but you get the idea. UNIX_TIMESTAMP() will take a formatted string and convert it to unix time.


Quote:
MySQL UNIX_TIMESTAMP() returns a Unix timestamp in seconds since '1970-01-01 00:00:00' UTC as an unsigned integer if no arguments are passed with UNIX_TIMESTAMP().

When this function is used with a date argument, it returns the value of the argument as an unsigned integer in seconds since '1970-01-01 00:00:00' UTC.

The argument may be a DATE, DATETIME,TIMESTAMP or a number in YYYYMMDD or YYMMDD.

Note: Since UNIX_TIMESTAMP() works on the current datetime, your output may vary from the output shown.

Syntax:

UNIX_TIMESTAMP(); UNIX_TIMESTAMP(date); UNIX_TIMESTAMP(datetime);
 

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DateTime::Format::DB2(3pm)				User Contributed Perl Documentation				DateTime::Format::DB2(3pm)

NAME
DateTime::Format::DB2 - Parse and format DB2 dates and times SYNOPSIS
use DateTime::Format::DB2; my $dt = DateTime::Format::DB2->parse_timestamp( '2003-01-16-23.12.01.300000' ); # 2003-01-16-23.12.01.300000 DateTime::Format::DB2->format_timestamp($dt); DESCRIPTION
This module understands the formats used by DB2 for its DATE, TIME, and TIMESTAMP data types. It can be used to parse these formats in order to create DateTime objects, and it can take a DateTime object and produce a string representing it in the DB2 format. METHODS
This class offers the following methods. All of the parsing methods set the returned DateTime object's time zone to the floating time zone, because DB2 does not provide time zone information. * parse_time($string) * parse_date($string) * parse_timestamp($string) Given a value of the appropriate type, this method will return a new "DateTime" object. The time zone for this object will always be the floating time zone, because by DB2 stores the local datetime, not UTC. If given an improperly formatted string, this method may die. * format_date($datetime) * format_time($datetime) * format_timestamp($datetime) Given a "DateTime" object, this methods returns an appropriately formatted string. SUPPORT
Support for this module is provided via the datetime@perl.org email list. See http://lists.perl.org/ for more details. AUTHOR
Jess Robinson <castaway@desert-island.demon.co.uk> This module was shamelessly cloned from Dave Rolsky's DateTime::Format::MySQL module. COPYRIGHT
Copyright (c) 2005 Jess Robinson. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
datetime@perl.org mailing list http://datetime.perl.org/ perl v5.8.8 2007-01-20 DateTime::Format::DB2(3pm)
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