To get max/min Date/Timestamp from a file

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# 1  
Old 06-15-2011
To get max/min Date/Timestamp from a file

I want to get maximum/minimum date/timestamp from a data file ?

Sample Input File
1,2010-12-01,2010-12-01 17:55:23.222222
2,2011-11-05,2010-12-01 19:55:23.222222
3,2009-10-01,2010-12-01 18:55:23.222222

for above file
Maximum Order_dt = 2011-11-05
Minimum Order_dt = 2009-10-01
Maximum Ext_ts = 2010-12-01 19:55:23.222222
Minimum Ext_ts = 2010-12-01 17:55:23.222222

Can somebody help me on this ?

Last edited by Franklin52; 06-15-2011 at 03:40 AM.. Reason: Please use code tags
# 2  
Old 06-15-2011
Give us sample data, three rows isn't enough to test.
# 3  
Old 06-15-2011
Originally Posted by kumaran_5555
Give us sample data, three rows isn't enough to test.

sample.txt attached.

Maximum(LOGONDATE) 2011-06-15
Minimum(LOGONDATE) 2011-05-31
Maximum(EXT_TS) 2011-06-15 07:41:14
Minimum(EXT_TS) 2011-05-31 10:16:49
# 4  
Old 06-15-2011
This code should work for you

If your seperator is pipe instead of comma use replace the dot with pipe inside -F"[-,:. ]"

awk -F"[-,:. ]" '


date=$2$3$4; ext=$5$6$7$8$9$10$11; 


print "min date "min_date
print "max date " max_date
print "min ext "min_ext
print "max ext "max_ext
}' test.txt

Your sample file isn't matching the initial sample given here. may be few changes has to be done.

Last edited by kumaran_5555; 06-15-2011 at 04:11 AM..
This User Gave Thanks to kumaran_5555 For This Post:
# 5  
Old 06-15-2011
Yes its working.
Thanks a lot Smilie
# 6  
Old 06-15-2011
This should do what you want using the sample.txt file as attached to your post.

awk -F'|' '

    BEGIN {
        # Get the heading line out of the way
        # Then prime min/max LOGONDATE/EXT_TS

        while (getline) {
            # for all other lines apart from heading and first, check if they are min/max
            if (min_2>$2) min_2=$2;
            if (max_2<$2) max_2=$2;
            if (min_3>$3) min_3=$3;
            if (max_3<$3) max_3=$3;

        # at end of input display
        printf "%-20s = %-30s\n" ,"min_"h2 ,min_2
        printf "%-20s = %-30s\n" ,"max_"h2 ,max_2
        printf "%-20s = %-30s\n" ,"min_"h3 ,min_3
        printf "%-20s = %-30s\n" ,"max_"h3 ,max_3
' sample.txt

Last edited by Franklin52; 06-15-2011 at 09:53 AM.. Reason: Please use code tags, thank you
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