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# 1  
Old 01-29-2014
Command needed
Hi,

I have the date as 20130101 and i need it to rephrased to 2013-01-01.

Any command which can do this.
# 2  
Old 01-29-2014
Code:
$ date -d"20130101" +"%Y-%m-%d" 
2013-01-01

$ date --date="20130101" +"%Y-%m-%d"
2013-01-01

go through man date

--edit--

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# 3  
Old 01-29-2014
Code:
mydate='20130301'
mydate=`echo "${mydate}" | sed 's,\(....\)\(..\)\(..\),\1-\2-\3,'`

# 4  
Old 01-29-2014
Code:
sed 's/./&-/6; s//&-/4'


--
Note: date --date or date -d is GNU date only...
Last edited by Scrutinizer; 01-29-2014 at 03:14 PM..
# 5  
Old 01-29-2014
Just so many methods to choose from... ;o)
Longhand...
Code:
Last login: Wed Jan 29 19:19:26 on ttys000
AMIGA:barrywalker~> mydate="20130101"
AMIGA:barrywalker~> echo "${mydate:0:4}-${mydate:4:2}-${mydate:6:2}"
2013-01-01
AMIGA:barrywalker~> _

This User Gave Thanks to wisecracker For This Post:
rbatte1
# 6  
Old 01-30-2014
The offering from wisecracker is probably easiest to understand and reuse for other purposes, but be aware that this is ksh93 or bash only. Older ksh probably won't support it.

The date functions are great if they work, but I haven't seen a good document on them yet. My man page for date is woeful. RHEL 6.3 even has:-
Quote:
The date string format is more complex than is easily documented here

To use an older ksh, try:-
Code:
mydate="20130101"
my_yyyy="${mydate%????}"
my_dd="${mydate#??????}"
my_mm="${mydate%$my_dd}"
my_mm="${my_mm#????}"

echo "${my_yyyy}-${my_mm}-${my_dd}"



I hope that this helps, if you need it.




Robin
This User Gave Thanks to rbatte1 For This Post:
wisecracker
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