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Joining files using awk not extracting all columns from File 2

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# 1  
Old 04-07-2016
Joining files using awk not extracting all columns from File 2
Hello All

I'm joining two files using Awk by Left outer join on the file 1

File 1

Code:
1 AA
2 BB
3 CC
4 DD

File 2

Code:
1 IND 100 200 300
2 AUS 400 500 600
5 USA 700 800 900

Below is the command used to do the left outer join:

Code:
awk 'NR==FNR{A[$1]=$2;next}{print$0 FS (A[$1]?A[$1]:"missing")}' file2 file1

Below is the output:
Code:
1 AA  IND
2 BB AUS
3 CC missing
4 DD missing

If you see, only first column from File 2 is being extracted and other columns are being ignored.

Any thoughts?

Thanks in advance.
Last edited by Scrutinizer; 04-08-2016 at 03:01 AM.. Reason: quote tags of input file -> code tags
# 2  
Old 04-07-2016
try:
Code:
awk 'NR==FNR{l=$1; $1=""; A[l]=$0;next}{print$0 (A[$1]?A[$1]:FS "missing")}' file2 file1

This User Gave Thanks to rdrtx1 For This Post:
venkat_reddy
# 3  
Old 04-08-2016
Quote:
Originally Posted by venkat_reddy
Hello All
I'm joining two files using Awk by Left outer join on the file 1

File 1
Code:
1 AA
2 BB
3 CC
4 DD

File 2

Code:
1 IND 100 200 300
2 AUS 400 500 600
5 USA 700 800 900

Below is the command used to do the left outer join:

Code:
awk 'NR==FNR{A[$1]=$2;next}{print$0 FS (A[$1]?A[$1]:"missing")}' file2 file1

Below is the output:
Code:
1 AA  IND
2 BB AUS
3 CC missing
4 DD missing

If you see, only first column from File 2 is being extracted and other columns are being ignored.
Any thoughts?
Thanks in advance.
Hello venkat_reddy,

Please use code tags as per forum rules, following may help you too in same.
Code:
awk 'FNR==NR{A[$1]=$2;next} ($1 in A){print $0 OFS A[$1];next} !($1 in A){print $0 OFS "missing"}' file2 file1
 OR
awk 'FNR==NR{A[$1]=$2;next} {Q=($1 in A)?$0 OFS A[$1]:$0 OFS "missing";print Q;Q=""}' file2 file1

Output will be as follows in both of above codes.
Code:
1 AA IND
2 BB AUS
3 CC missing
4 DD missing

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
venkat_reddy
# 4  
Old 04-08-2016
@rdrtx1:

Code suggested by you worked. Thanks a lot

@Ravinder:

I did try out the code suggested by you but its giving me same output which I was getting earlier. I need all the columns from the File 2 .Anyways thanks much for the response
# 5  
Old 04-08-2016
Please show us the output you are trying to produce from your two sample input files (in CODE tags).
# 6  
Old 04-08-2016
Below is the output

Code:
-sh-4.1$ awk 'FNR==NR{A[$1]=$2;next} ($1 in A){print $0 OFS A[$1];next} !($1 in A){print $0 OFS "missing"}' b a
1 AA  IND
2 BB AUS
3 CC missing
4 DD missing

Code:
-sh-4.1$ awk 'FNR==NR{A[$1]=$2;next} {Q=($1 in A)?$0 OFS A[$1]:$0 OFS "missing";print Q;Q=""}' b a
1 AA  IND
2 BB AUS
3 CC missing
4 DD missing

Below are the files:

Code:
-sh-4.1$ more a
1 AA
2 BB
3 CC
4 DD

Code:
-sh-4.1$ more b
1 IND 100 200 300
2 AUS 400 500 600
5 USA 700 800 900

# 7  
Old 04-08-2016
Hello venkat_reddy,

I see my code has solved your requirement, could you please explain little further like how and where you are seeing issues? It will be good for us to help you please.


Thanks,
R. Singh
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