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Find duplicate based on 'n' fields and mark the duplicate as 'D'

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Top Forums Shell Programming and Scripting Find duplicate based on 'n' fields and mark the duplicate as 'D'
# 1  
Old 01-28-2012
Find duplicate based on 'n' fields and mark the duplicate as 'D'
Hi,

In a file, I have to mark duplicate records as 'D' and the latest record alone as 'C'.

In the below file, I have to identify if duplicate records are there or not based on Man_ID, Man_DT, Ship_ID and I have to mark the record with latest Ship_DT as "C" and other as "D" (I have to create a new field at the end of the records as "C" or "D")

Code:
File 1
====
Man_ID|Man_Dt|Ship_Id|Ship_Dt|ItemID|Noof ITEMS|ItemNam
001|2010-12-31|11|2010-12-31|111|2|Jackets
002|2010-12-31|12|2010-12-31|111|1|Caps
001|2010-12-31|11|2009-11-31|111|2|Jackets
001|2010-12-31|11|2011-12-31|111|2|Jackets
003|2010-11-01|13|2011-12-31|111|1|Shoes

Expected Output

File 1
=====
Man_ID|Man_Dt|Ship_Id|Ship_Dt|ItemID|Noof ITEMS|ItemNam
 001|2010-12-31|11|2010-12-31|111|2|Jackets|D
002|2010-12-31|12|2010-12-31|111|1|Caps
001|2010-12-31|11|2009-11-31|111|2|Jackets|D
 001|2010-12-31|11|2011-12-31|111|2|Jackets|C
003|2010-11-01|13|2011-12-31|111|1|Shoes

Last edited by machomaddy; 01-28-2012 at 06:37 AM.. Reason: Edited wrong Input "2010-12-31" to "2011-12-31" in the 4th record
# 2  
Old 01-28-2012
hi
you have provided the wrong input.
The output is not according to the input
# 3  
Old 01-28-2012
Thanks parth!!
# 4  
Old 01-28-2012
Code:
awk '{s=$1 FS $2 FS $3} 
     NR==FNR{a[s]++;b[s]=FNR;next}
     FNR==1{print;next} 
     {if (a[s]<2)
           {print}
      else
           {print (b[s]==FNR)?$0 "|C":$0 "|D"}}' FS=\| OFS=\| infile infile

These 2 Users Gave Thanks to rdcwayx For This Post:
machomaddy parthmittal2007
# 5  
Old 01-28-2012
Thanks, rdcwayx!! Smilie Could please explain the code? It will be very helpful
# 6  
Old 01-28-2012
hi rdcwayx:

your code does not work in this case:

Man_ID|Man_Dt|Ship_Id|Ship_Dt|ItemID|Noof ITEMS|ItemNam
001|2010-12-31|11|2010-12-31|111|2|Jackets
002|2010-12-31|12|2010-12-31|111|1|Caps
001|2010-12-31|11|2012-11-31|111|2|Jackets
001|2010-12-31|11|2011-12-31|111|2|Jackets
003|2010-11-01|13|2011-12-31|111|1|Shoes

---------- Post updated at 11:38 AM ---------- Previous update was at 11:36 AM ----------

According to this data the output should be-:
Man_ID|Man_Dt|Ship_Id|Ship_Dt|ItemID|Noof ITEMS|ItemNam
001|2010-12-31|11|2010-12-31|111|2|Jackets|D
002|2010-12-31|12|2010-12-31|111|1|Caps
001|2010-12-31|11|2012-11-31|111|2|Jackets|C
001|2010-12-31|11|2011-12-31|111|2|Jackets|D
003|2010-11-01|13|2011-12-31|111|1|Shoes

---------- Post updated at 11:41 AM ---------- Previous update was at 11:38 AM ----------

and from your code the output is coming:

Man_ID|Man_Dt|Ship_Id|Ship_Dt|ItemID|Noof ITEMS|ItemNam
001|2010-12-31|11|2010-12-31|111|2|Jackets|D
002|2010-12-31|12|2010-12-31|111|1|Caps
001|2010-12-31|11|2012-11-31|111|2|Jackets|D
001|2010-12-31|11|2011-12-31|111|2|Jackets|C
003|2010-11-01|13|2011-12-31|111|1|Shoes
This User Gave Thanks to parthmittal2007 For This Post:
rdcwayx
# 7  
Old 01-28-2012
oh!!! am sorry...I missed it...My bad. Yes the code works as what parthmittal says!
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