Using awk to remove duplicate line if field is empty


 
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# 1  
Old 01-15-2015
Using awk to remove duplicate line if field is empty

Hi all,

I've got a file that has 12 fields. I've merged 2 files and there will be some duplicates in the following:

FILE:

Code:
1. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, 100
2. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, (EMPTY)
3. CDC, 54321, TEST3, BILLING, VG, 10/11/2012, D, 9, 99, BB, AA, 99
4. CDC, 54321, TEST3, BILLING, VG, 10/11/2012, D, 9, 99, BB, AA, (EMPTY)
5. AAA, 34535, TEST1, BILLING, CC, 12/09/2011, C, 9, 99, BB, CC, (EMPTY)

OUTPUT:

Code:
1. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, 100
3. CDC, 54321, TEST3, BILLING, VG, 10/11/2012, D, 9, 99, BB, AA, 99
5. AAA, 34535, TEST1, BILLING, CC, 12/09/2011, C, 9, 99, BB, CC, (EMPTY)

Need an awk script to remove lines 2 and 4 because there is no data in the 12th field. Line 5 would still remain as there is no other duplicate line.

I have no problem removing these in excel but i need the script to remove them so that the user doesn't need to remove them in excel.

Thanks!

Last edited by Scrutinizer; 01-17-2015 at 04:00 AM..
# 2  
Old 01-16-2015
Hello tugar,

Could you please try following and let me know if this helps.
Code:
awk -F, '{A[$1 FS $2 FS $3 FS $4 FS $5 FS $6 FS $7 FS $8 FS $9 FS $10 FS $11]+=$12} END{for(i in A){if(!A[i]){print i} else {print i OFS A[i]}}}' OFS=", "  Input_file

Output will be as follows.
Code:
ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, 100
CDC, 54321, TEST3, BILLING, VG, 10/11/2012, D, 9, 99, BB, AA, 99
AAA, 34535, TEST1, BILLING, CC, 12/09/2011, C, 9, 99, BB, CC

EDIT: Adding a non oneliner form for same.
Code:
awk -F, '       {
                        A[$1 FS $2 FS $3 FS $4 FS $5 FS $6 FS $7 FS $8 FS $9 FS $10 FS $11]+=$12
                }
         END    {       for(i in A)      {
                                if(!A[i]){
                                                print i
                                         }
                                else     {
                                                print i OFS A[i]
                                         }
                                         }
                }
        ' OFS=", "  Input_file


Thanks,
R. Singh

Last edited by RavinderSingh13; 01-16-2015 at 12:58 AM.. Reason: Added a non one liner form of solution
This User Gave Thanks to RavinderSingh13 For This Post:
# 3  
Old 01-16-2015
Worked flawlessly!

Thank you Ravinder.
# 4  
Old 01-16-2015
Linux

If the data follows these rules (reverse lexicographical order), you can write like this.

Code:
$12 && (p = $0) && NF-- && (l = $0) && $0 = p;!$12 && l != $0;

rules
  • empty duplicate line appears only as the next line of its not empty duplicate line.
# 5  
Old 01-17-2015
If the file is ordered, try:
Code:
awk -F", *" '{p=$0; $NF=x} !A[$0]++{print p}' file

 
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