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# 1  
Old 02-23-2016
Remove duplicates
Hi I have a below file structure.
Code:
200,1245,E1,1,E1,,7611068,KWH,30, ,,,,,,,,
200,1245,E1,1,E1,,7611070,KWH,30, ,,,,,,,,
300,20140223,0.001,0.001,0.001,0.001,0.001
300,20140224,0.001,0.001,0.001,0.001,0.001
300,20140225,0.001,0.001,0.001,0.001,0.001
300,20140226,0.001,0.001,0.001,0.001,0.001
300,20140227,0.001,0.001,0.001,0.001,0.001
300,20140228,0.001,0.001,0.001,0.001,0.001
300,20140301,0.001,0.001,0.001,0.001,0.001
300,20140302,0.001,0.001,0.001,0.001,0.001
300,20140303,0.001,0.001,0.001,0.001,0.001
300,20140304,0.001,0.001,0.001,0.001,0.001
300,20140305,0.001,0.001,0.001,0.001,0.001
200,1254,E1,1,E1,,4749337,KWH,30, ,,,,,,,,
300,20140306,0.001,0.001,0.001,0.001,0.001

I need below output.
Code:
200,1245,E1,1,E1,,7611070,KWH,30, ,,,,,,,,
300,20140223,0.001,0.001,0.001,0.001,0.001
300,20140224,0.001,0.001,0.001,0.001,0.001
300,20140225,0.001,0.001,0.001,0.001,0.001
300,20140226,0.001,0.001,0.001,0.001,0.001
300,20140227,0.001,0.001,0.001,0.001,0.001
300,20140228,0.001,0.001,0.001,0.001,0.001
300,20140301,0.001,0.001,0.001,0.001,0.001
300,20140302,0.001,0.001,0.001,0.001,0.001
300,20140303,0.001,0.001,0.001,0.001,0.001
300,20140304,0.001,0.001,0.001,0.001,0.001
300,20140305,0.001,0.001,0.001,0.001,0.001
200,1254,E1,1,E1,,4749337,KWH,30, ,,,,,,,,
300,20140306,0.001,0.001,0.001,0.001,0.001

I need to remove duplicates based on first column only when it 200 by retaining the last one. In doing so the order of records should not change.
Last edited by vbe; 02-23-2016 at 06:41 AM.. Reason: code tags please
# 2  
Old 02-23-2016
Welcome tejashavele,

I have a few to questions pose in response first:-
  • Is this homework/assignment? There are specific forums for these.
  • What have you tried so far?
  • What output/errors do you get?
  • What OS and version are you using?
  • What are your preferred tools? (C, shell, perl, awk, etc.)
  • What logical process have you considered? (to help steer us to follow what you are trying to achieve)
Most importantly, What have you tried so far?

There are probably many ways to achieve most tasks, so giving us an idea of your style and thoughts will help us guide you to an answer most suitable to you so you can adjust it to suit your needs in future.


We're all here to learn and getting the relevant information will help us all.



Robin
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