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Full Discussion: Sorting a CSV file by DOB
Top Forums Shell Programming and Scripting Sorting a CSV file by DOB Post 302758113 by Yoda on Friday 18th of January 2013 01:08:26 PM
Old 01-18-2013
Convert date to epoch and perform the sort. Here is an example:
Code:
#!/bin/bash

rm -f output.txt
while IFS=, read ft lt ph dt
do
        fdt=$( echo ${dt:3:2}/${dt:0:2}/${dt:6:4} )
        eph=$( date -d"$fdt" +"%s" )
        echo "${eph},${ft},${lt},${ph},${dt}" >> output.txt
done < birthday.csv

sort -t"," -n output.txt | awk -F, ' { print $2,$3,$4,$5; } ' OFS=,

Here is the output:
Code:
$ cat birthday.csv
First_1,Last_1,1234,08/10/1991
First_2,Last_2,1234,10/05/1990

$ ./sort_by_dt.sh
First_2,Last_2,1234,10/05/1990
First_1,Last_1,1234,08/10/1991

This User Gave Thanks to Yoda For This Post:
redshine6
 

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LEARN ABOUT DEBIAN

convdate

CONVDATE(1)						      General Commands Manual						       CONVDATE(1)

NAME

       convdate - convert time/date strings and numbers

SYNOPSIS

       convdate [ -c ] [ -n ] [ -s ] arg...

DESCRIPTION

       Convdate translate the date/time strings specified as arguments on its command line, outputing the results one to a line.

OPTIONS

       -c     If the ``-c'' flag is used, then each argument is taken to be a time_t and is output in ctime format.

       -n     If the ``-n'' flag is used, then each argument is taken as a date string to be parsed by parsedate(3) and is output as a time_t; see
	      time(2).

       -s     If the ``-s'' flag is used, then each argument is taken as a date string to be parsed by parsedate(3) and is output as a string for-
	      matted by ctime(3).  This is the default.

EXAMPLES

	      % convdate 'feb 10 10am'
	      Sun Feb 10 10:00:00 1991

	      % convdate 12pm 5/4/90
	      Fri Dec 13 00:00:00 1991
	      Fri May  4 00:00:00 1990

	      % convdate -n 'feb 10 10am' '12pm 5/4/90'
	      666198000
	      641880000

	      % convdate -c 666198000
	      Sun Feb 10 10:00:00 1991

HISTORY

       Written by Rich $alz <rsalz@uunet.uu.net>.  This is revision 1.5, dated 1996/10/29.

SEE ALSO

       parsedate(3).

																       CONVDATE(1)
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