Sponsored Content
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);
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

count and compare no of records in bash shell script.

consider this as a csv file. H,0002,0002,20100218,17.25,P,barani D,1,2,3,4,5,6,7,8,9,10,11 D,1,2,3,4,5,6,7,8,9,10,11 D,1,2,3,4,5,6,7,8,9,10,11 D,1,2,3,4,5,6,7,8,9,10,11 D,1,2,3,4,5,6,7,8,9,10,11 T,5 N i want to read the csv file and count the number of rows that start with D and... (11 Replies)
Discussion started by: barani75
11 Replies

2. Shell Programming and Scripting

How to compare time in bash script?

Hi, Anyone know how to compare the time in bash script? I want to compare say 30 min. to 45 min. ( AIX ) Thanks. (1 Reply)
Discussion started by: sumit30
1 Replies

3. Shell Programming and Scripting

Bash script to compare two lists

Hi, I do little bash scripting so sorry for my ignorance. How do I compare if the two variable not match and if they do not match run a command. I was thinking a for loop but then I need another for loop for the 2nd list and I do not think that would work as in the real world there could... (2 Replies)
Discussion started by: GermanJulian
2 Replies

4. Shell Programming and Scripting

Date Compare Script

Hi All, I wil be having Files as below in SourceFile_Path DIR AA.20110131 AA.20110228 AA.20110202 AA.20110330 BB.20091031 I want to Keep only monthly (20110131,20110228,20100229,20110330) in First SourceFile_Path, If it is not monthly file then want to Move files to some another... (5 Replies)
Discussion started by: samadhanpatil
5 Replies

5. Shell Programming and Scripting

Compare & Copy Directories : Bash Script Help

Beginner/Intermediate shell; comfortable in the command line. I have been looking for a solution to a backup problem. I need to compare Directory 1 to Directory 2 and copy all modified or new files/directories from Directory 1 to Directory 3. I need the directory and file structure to be... (4 Replies)
Discussion started by: Rod
4 Replies

6. Shell Programming and Scripting

Shell script to compare two files of todays date and yesterday's date

hi all, How to compare two files whether they are same are not...? like i had my input files as 20141201_file.txt and 20141130_file2.txt how to compare the above files based on date .. like todays file and yesterdays file...? (4 Replies)
Discussion started by: hemanthsaikumar
4 Replies

7. Shell Programming and Scripting

Bash script to compare 2 file

Hello Friends please help me to create script to compare 2 fiile which has rpm info . File 1: glibc-2.12.1.149.el6_6.5.x86_64.rpm glibc-common-2.12-1.149.el6_6.5.x86_64.rpm File 2 : glibc-2.12.123.el6_6.5.x86_64.rpm glibc-common-2.12-123.el6_6.5.x86_64.rpm To compare file1... (1 Reply)
Discussion started by: rnary
1 Replies

8. Shell Programming and Scripting

Array compare bash script

Hello, i have a script that should compare between ${ARRAY} that contains all fstab record like this : >>echo ${ARRAY} / /boot between all mountpoints in my df that is stord in ${ARRAY2} >>echo ${ARRAY2} / /boot /dev/shm /var/spool/asterisk/monitor now i have this loop: for i in... (6 Replies)
Discussion started by: batchenr
6 Replies

9. UNIX for Beginners Questions & Answers

Bash script to compare file all the files exits or not

Currently i am building a script like based on region parameter it will filter the records in config file and then it will create a text file like ab.txt and it will read the path location in that file and now i need to compare the files name in the config file to files in the path of the config... (1 Reply)
Discussion started by: saranath
1 Replies

10. UNIX for Beginners Questions & Answers

Compare Date to today's date in shell script

Hi Community! Following on from this code in another thread: #!/bin/bash file_string=`/bin/cat date.txt | /usr/bin/awk '{print $5,$4,$7,$6,$8}'` file_date=`/bin/date -d "$file_string"` file_epoch=`/bin/date -d "$file_string" +%s` now_epoch=`/bin/date +%s` if then #let... (2 Replies)
Discussion started by: Greenage
2 Replies
Weather::Com::DateTime(3pm)				User Contributed Perl Documentation			       Weather::Com::DateTime(3pm)

NAME
Weather::Com::DateTime - date and time class SYNOPSIS
#!/usr/bin/perl -w use Weather::Com::DateTime; my $gmt_offset = 1; # e.g. for Germany in winter my $datetime = Weather::Com::DateTime->new($gmt_offset); $datetime->set_lsup('02/25/05 11:21 PM Local Time'); print "This is the date '02/25/05 11:21 PM' in Germany: "; print "Epoc: ", $datetime->epoc(), " "; print "GMT (UTC): ". gmtime($datetime->epoc()). " "; print "My local time: ". localtime($datetime->epoc()). " "; print "And finally German time: ", $datetime->time(), " o'clock at ", $datetime->date(), " "; DESCRIPTION
Weather::Com::DateTime objects are used to encapsulate a date or time provided by the OO interface (e.g. localtime, sunrise, sunset, etc.). This is done because there are many ways to use a date or time and to present it in your programs using Weather::Com. This class provides some predefined formats for date and time but also enables you to easily define your own ones. These objects always represent the local time of a Weather::Com::Location object. That is, if you have a location object for New York City and your server running the weather script is located in Los Angeles, for example, this line print "Sunrise at: ", $location->sunrise()->time(), " "; will print the time of sunrise (in 24h format) in EST and not corresponding to the timezone of Los Angeles! If you'd like to now what this is in GMT you could call print "Sunrise at: ". gmtime($location->sunrise()->epoc()). " "; or if you want to know when the sun rises at the location in your servers local time than just call print "Sunrise at: ". localtime($location->sunrise()->epoc()). " "; There are two ways to get your own date or time format: 1. You use the "formatted()" method and provide a format string to it. 2. If you'd like to define your own "date()" or "time()" method, simply change the corresponding methods. What you can change in which way without destroying the whole class, is described in section INTERFACE. CONSTRUCTOR
You usually would not construct an object of this class yourself. This is implicitely done when you call one of the OO interfaces date or time methods. The constructor can take a GMT offset in positive or negative hours. If one calls the constructor without any GMT offset, we assume you want a GMT object. METHODS
epoc(epoc seconds) With this method you can set the date and time using epocs (GMT) directly. It returns the currently set epoc seconds (GMT). formatted(format) This method returns a date or time formatted in the way you ask for and corresponding to the local time of the parent object. The "format" you provide to this method has to be a valid Time::Format format. For details please refer to Time::Format. set_date(date) With this method one can set the date of the object using an input format like "Feb 13" which is the 13th of february of the current year. Using this method, the time is set to 00:00. The year is the current one. set_time(time) With this method one can set the time of the object using an input format like "8:30 AM". The date is set to the current date of the host the script is running on. set_lsup(lsup) With this method one can set the date of the object using the weather.com's special last update format that is like "2/12/05 4:50 PM Local Time". date() Returns the date in the format "1. February 2005". time() Returns the time in the format "22:15". time_ampm() Returns the time in the format "10:15 PM". weekday() Returns the day of week with like "Wednesday". day() Returns the day in month. month() Returns the name of the month. mon() Returns the number of the month year() Returns the year (4 digits). AUTHOR
Thomas Schnuecker, <thomas@schnuecker.de> COPYRIGHT AND LICENSE
Copyright (C) 2004-2007 by Thomas Schnuecker This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The data provided by weather.com and made accessible by this OO interface can be used for free under special terms. Please have a look at the application programming guide of weather.com (<http://www.weather.com/services/xmloap.html>)! perl v5.8.8 2007-07-09 Weather::Com::DateTime(3pm)
All times are GMT -4. The time now is 10:33 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy