Login or Register to Ask a Question and Join Our Community

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

LEARN ABOUT CENTOS

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
All times are GMT -4. The time now is 09:35 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy