Compare selected columns from a file and print difference


 
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# 1  
Old 07-19-2009
Compare selected columns from a file and print difference

I have learned file comparison from my previous post here. Then, it is comparing the whole line. Now, i have a new problem.
I have two files with 3 columns separated with a "|". What i want to do is to compare the second and third column of file 1, and the second and third column of file 2. And print the whole line (including the first column) with difference in a new file. Thanks!
# 2  
Old 07-19-2009
Can you give me one example....
# 3  
Old 07-19-2009
File 1
Code:
ADG | 234 | 345
ADG | 567 | 789
DJG | 324 | 321

File 2
Code:
ADG | 235 | 345
ADG | 567 | 789
DJG | 324 | 320

Output:
"FROM FILE 1"
Code:
ADG | 234 | 345
DJG | 324 | 321

"FROM FILE 2"
Code:
ADG | 235 | 345
DJG | 324 | 320


Last edited by vgersh99; 07-19-2009 at 07:48 PM.. Reason: code tags, PLEASE!
# 4  
Old 07-19-2009
To keep the forums high quality for all users, please take the time to format your posts correctly.

First of all, use Code Tags when you post any code or data samples so others can easily read your code. You can easily do this by highlighting your code and then clicking on the # in the editing menu. (You can also type code tags [code] and [/code] by hand.)

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Thank You.

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---------- Post updated at 06:02 PM ---------- Previous update was at 05:41 PM ----------

nawk -f king.awk file1 file

king.awk:
Code:
BEGIN {
  FS=" *[|] *"
  OFS="|"
}
{ idx =$2 OFS $3}
FNR==NR {
   f1[idx]= $0
   next
}
idx in f1 { delete f1[idx];next}
1
END {
  for(i in f1)
    print f1[i]
}

# 5  
Old 07-20-2009
Thanks! But is there a shorter code for this?
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