Sponsored Content
Top Forums Shell Programming and Scripting Date format change in a csv file Post 302949032 by drl on Monday 6th of July 2015 09:45:05 AM
Old 07-06-2015
Hi.

A utility, dadd, in package dateutils can do the arithmetic and reformatting. It seems to be in many repositories ( e.g. arch, FreeBSD, Slackware, Mac OS X "brew" etc.), and source is available (github). I compiled it for an earlier version of Debian.

A single command suffices to process all conforming dates:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate date reformat, arithmetic, dateutils, dadd.
# "dadd" is part of dateutils, repository Debian/Jessie, MiNT, # Ubuntu, etc.
# Also: http://www.fresse.org/dateutils.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C dadd

FILE=${1-data1}

pl " Input data file $FILE:"
cat $FILE

# In : MM/DD/YYYY HH:MM:SS
# Out: DD/Mon/YYYY HH:MM:SS
pl " Results:"
dadd -S -i '%m/%d/%Y' +1mo -f '%d/%b/%Y' < $FILE

exit 0

producing:
Code:
$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian 5.0.8 (lenny, workstation) 
bash GNU bash 3.2.39
dadd 0.2.6

-----
 Input data file data1:
First line, no dates, some blank lines appear.
Today was: Mon Jul  6 08:18:06 CDT 2015

06/23/2015 20:59:12
Now is the time 06/23/2015 20:59:12 for all good men

No dates here.
When was 06/23/2015 20:59:12, another 06/23/2015 20:59:12, not 2015.06.23 20:59:12

Last line, no dates.

-----
 Results:
First line, no dates, some blank lines appear.
Today was: Mon Jul  6 08:18:06 CDT 2015

23/Jul/2015 20:59:12
Now is the time 23/Jul/2015 20:59:12 for all good men

No dates here.
When was 23/Jul/2015 20:59:12, another 23/Jul/2015 20:59:12, not 2015.06.23 20:59:12

Last line, no dates.

Sample input and output are best to supply with the original question, otherwise responders need to create them, which may or may not match what is really needed.

Best wishes ... cheers, drl
This User Gave Thanks to drl For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

script to change the date format in a file

i have many files with date format of 6-9-2008 and i want a script that can change the format to 2008-06-09 Thanks (15 Replies)
Discussion started by: shehzad_m
15 Replies

2. Shell Programming and Scripting

Format a date in a csv file

So I have a csv file where the 3rd field is a date string in the format yyyy-mm-dd. I need to change it to mm/dd/yyyy. So each line in the csv file looks like: StringData,StringData,2009-02-17,12.345,StringData StringData,StringData,2009-02-16,65.789,StringData Any idea how I can keep... (5 Replies)
Discussion started by: rpiller
5 Replies

3. Shell Programming and Scripting

How to change date format in file

Hello! I have a textfile that look like this: "83d1:46:2b";"20091008190000";"Rögle BK - Skellefteå";"Swedish" "d4c:46:21";"20091008190000";"Södertälje - Brynäs";"Swedish" "d4b:46:2";"20091008190000";"HV 71 - Färjestad";"Swedish" "838:46:b";"20091010160000";"Skellefteå - HV 71";"Swedish"... (2 Replies)
Discussion started by: condmaster
2 Replies

4. Shell Programming and Scripting

File date format how to change

Hi All, Below are the unix files taken by the help of ls -lrt -rw-r--r-- 1 kbehera Domain Users 293 Jul 27 13:33 sand.txt -rw-r--r-- 1 kbehera Domain Users 4 Jul 27 13:37 sand1.txt -rw-r--r-- 1 kbehera Domain Users 293 Jul 27 15:30 new_sand.txt -rw-r--r-- 1 kbehera Domain Users 0 Jul 27... (2 Replies)
Discussion started by: krupasindhu18
2 Replies

5. Shell Programming and Scripting

Changing date format in CSV file

I have a CSV file with a date format like this; 11/19/2012 17:37:00,1.372,121.6 11/19/2012 17:38:00,0.743,121.6 Want to change the time stamp to seconds after 1970 so I can get the data in rrdtool. For anyone interested, this is data from a TED5000 unit and is Kwatts and volts. Needs to... (3 Replies)
Discussion started by: ottsm
3 Replies

6. Shell Programming and Scripting

How to change the format of the date column in a flat file?

Hi, i have a flat file namely temp.txt with this data below ID|name|contact_date 101|Kay|2013-12-26 102|let|2013-12-26 I need to modify the date data in the flat file into MM/DD/YYYY HH24:MI:SS format let me know the code for this. Thank you! (5 Replies)
Discussion started by: srikanth_sagi
5 Replies

7. Shell Programming and Scripting

Datestamp format 2nd change in csv file (awk or sed)

I have a csv file formatted like this: 2014-08-21 18:06:26,A,B,12345,123,C,1232,26/08/14 18:07and I'm trying to change it to MM/DD/YYYY HH:MM for both occurances. I have got this: awk -F, 'NR <=1 {print;next}{"date +%d/%m/%Y\" \"%H:%m -d\""$1 "\""| getline dte;$1=dte}1' OFS="," test.csvThis... (6 Replies)
Discussion started by: say170
6 Replies

8. Shell Programming and Scripting

Need to change date format in a csv file using awk

Example: Input csv file 00245DLS,Sitel Ocala,12/31/2014,18:45,1.00,7.00,0.00,0.00 00245DLS,Sitel Ocala,12/31/2014,19:00,-1.00,-1.00,-1.00,-1.00 00245HB,Charlotte,01/01/2015,00:00,-1.00,-1.00,-1.00,0.00 Output csv file 00245DLS,Sitel Ocala,2014/12/31,18:45,1.00,7.00,0.00,0.00 00245DLS,Sitel... (8 Replies)
Discussion started by: adit
8 Replies

9. Shell Programming and Scripting

Change date format in am/pm in csv files using UNIX

Hi All, I'm new to forum good to hear all. I stuck in converting date format in csv file using unix csv file contains as below ,750,0000000000000000GCJR, ,06/22/2016 14:48:44 I want to convert into as below ,750,0000000000000000GCJR, ,06/22/2016 02:48:44 PM Please reply asap..... (22 Replies)
Discussion started by: Raghureds
22 Replies

10. UNIX for Beginners Questions & Answers

Change date format in a file.

Hi all, I have a file as below, i would like the change the format of the time from "11/7/2019 20:12" to "2019-07-11 20:12:00" in the last coloumn. any awk solution on this. Input: 2,0,695016,1961612,497212,5800804,0,0,161,33,7605,12226,23,10,66,0,0,34,11/7/2019 20:10... (4 Replies)
Discussion started by: Raghuram717
4 Replies
env(1)								   User Commands							    env(1)

NAME
env - set environment for command invocation SYNOPSIS
/usr/bin/env [-i | -] [name=value...] [ utility [ arg... ]] /usr/xpg4/bin/env [-i | -] [name=value...] [ utility [ arg... ]] DESCRIPTION
The env utility obtains the current environment, modifies it according to its arguments, then invokes the utility named by the utility op- erand with the modified environment. Optional arguments are passed to utility. If no utility operand is specified, the resulting environment is written to the standard output, with one name=value pair per line. /usr/bin If env executes commands with arguments, it uses the default shell /usr/bin/sh (see sh(1)). /usr/xpg4/bin If env executes commands with arguments, it uses /usr/xpg4/bin/sh (see ksh(1)). OPTIONS
The following options are supported: -i | - Ignores the environment that would otherwise be inherited from the current shell. Restricts the environment for utility to that specified by the arguments. OPERANDS
The following operands are supported: name=value Arguments of the form name=value modify the execution environment, and are placed into the inherited environment before utility is invoked. utility The name of the utility to be invoked. If utility names any of the special shell built-in utilities, the results are unde- fined. arg A string to pass as an argument for the invoked utility. EXAMPLES
Example 1: Invoking utilities with new PATH values The following utility: example% env -i PATH=/mybin mygrep xyz myfile invokes the utility mygrep with a new PATH value as the only entry in its environment. In this case, PATH is used to locate mygrep, which then must reside in /mybin. ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of env: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. PATH Determine the location of the utility. If PATH is specified as a name=value operand to env, the value given shall be used in the search for utility. EXIT STATUS
If utility is invoked, the exit status of env is the exit status of utility. Otherwise, the env utility returns one of the following exit values: 0 Successful completion. 1-125 An error occurred. 126 utility was found but could not be invoked. 127 utility could not be found. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: /usr/bin +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ /usr/xpg4/bin +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWxcu4 | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), sh(1), exec(2), profile(4), attributes(5), environ(5), standards(5) SunOS 5.10 2 Jan 2002 env(1)
All times are GMT -4. The time now is 02:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy