Convert DD-MMM-YYYY to MM-DD-YYYY


 
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# 1  
Old 04-06-2009
Convert DD-MMM-YYYY to MM-DD-YYYY

I have a file which has 100k+ records like this

Code:

Code:
abc,05-JUN-1974,def,lkj,aaa
def,11-SEP-1975,ghj,dis,dea



I want to convert ex 05-JUN-1974 to 06/05/1974

Please help me with awk script to convert the whole file into MM-DD-YYYY

Thank you!
# 2  
Old 04-06-2009
Convert DD-MMM-YYYY to MM-DD-YYYY

Try this:

Code:
awk -F, '
BEGIN {
  split("JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC", month, " ")
  for (i=1; i<=12; i++) mdigit[month[i]]=i
}
{ m=substr($2,4,3)
  $2 = sprintf("%02d/%02d/%04d",mdigit[m],substr($2,1,2),substr($2,8,20))
  print
}' OFS="," file

Use nawk or /usr/xpg4/bin/awk on Solaris if you get errors.

Regards
# 3  
Old 04-06-2009
Even easier:

date --date='05-JUN-1974' '+%m-%d-%Y'

Example:
[root@scm-lnx svn_repo]# date --date='05-JUN-1974' '+%m-%d-%Y'
06-05-1974

Of course this assumes you're using Linux and your date utility allows the --date option.

Last edited by sandholm; 04-06-2009 at 05:28 PM.. Reason: added example
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