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Joining Two Files Matching Two Columns

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# 1  
Old 07-15-2016
Joining Two Files Matching Two Columns
Hi All,

I am looking to join two files where column 1 of file A matches with column 1 of file B and column 5 of files A matches with column 2 of file B. After joining the files based on above condition, out should contain entire line of file A and column 3, 4 and 5 of file B.

Here is sample data:


Code:
File A

7507345|NIP1|0.0.0.2|127369256|17561|Closed
3323077|NIP1|0.0.0.1|142830388|34727|Closed
3323077|NIP4|0.0.0.1|773455302|386196|Closed
8171620|NIP8|0.0.0.1|176123103157225888|Closed

File B

7507345|17561|ED|BILL|0
3323077|34727|EF|LAST_BILL_T|0

I have gone through the thread "Join two files combining multiple columns and produce mix and match output* but still not clear on this.

I will appreciate your help on this.

Thanks
Angsuman




Moderator's Comments:
Mod Comment Please use code tags, NOT icode tags for data also!
Last edited by RudiC; 07-15-2016 at 02:12 PM.. Reason: Changed ICODE tags to CODE tags.
# 2  
Old 07-15-2016
How did you apply/modify that cited thread?
# 3  
Old 07-16-2016
Hello RudiC,

I have used following comparing my requirement with example given in the thread. It did not work for me.

Here is the command:

Code:
awk -F, 'FNR==NR{A[$2 OFS $3]=FILENAME"."$1 OFS FILENAME"."$3;B[$2 OFS $3]=FILENAME"."$2;next} ($1 OFS $4 in A){print A[$1 OFS $4] OFS FILENAME"." $6 OFS FILENAME"." $1 OFS B[$1 OFS $4] OFS FILENAME"." $1}' OFS=, fileA fileB

I need help to understand the how does that command works.

Thanks
Angshuman
Last edited by Don Cragun; 07-16-2016 at 08:49 PM.. Reason: Change HTML tags to CODE tags.
# 4  
Old 07-16-2016
Did you apply that command totally unmodified? After specifying in post#1 that you want to match fields 1 and 5 of fileA with fields 1 and 2 of fileB, you are using fields 2 and 3 of fileA and fields 1 and 4 of fileB. Do you see a chance this should work? On top, the field separator of your files seems to be | , but the script uses , .

A few hints on that script: It first reads fileA and tries to assign a string composition of FILENAME and fields 1 and 3 to array A indexed by fields 2 and 3 (which fails as the fields are NOT separated due to wrong FS) and similar to array B. Then, reading fileB, it tries to match fields 1 and 4 with the indices of A (which would fail even if the FS were correct), and, on positive match, prints an even stranger composition of array elements, FILENAMEs, and fields. Like
Code:
file1.7507345|file1.0.0.0.2|file2.|file2.7507345||file2.7507345
file1.3323077|file1.0.0.0.1|file2.|file2.3323077||file2.3323077

(after correcting for the worst errors)
Last edited by RudiC; 07-16-2016 at 11:02 AM..
# 5  
Old 07-16-2016
Hello RudiC,

I modified the script as per my requirement but it failed to give output. I did not understand the part "tries to assign a string composition of FILENAME and fields 1 and 3 to array A indexed by by fields 2 and 3". Here is my date and requirement:

Code:
File A

7507345|NIP1|0.0.0.2|127369256|17561|Closed
3323077|NIP1|0.0.0.1|142830388|34727|Closed
3323077|NIP4|0.0.0.1|773455302|386196|Closed
8171620|NIP8|0.0.0.1|176123103157225888|Closed

File B

7507345|17561|ED|BILL|0
3323077|34727|EF|LAST_BILL_T|0

Expected Output:

7507345|NIP1|0.0.0.2|127369256|17561|ED|BILL|0
3323077|NIP1|0.0.0.1|142830388|34727|EF|LAST_BILL_T|0

I will really appreciate if you can suggest.

Thanks
Angshuman
# 6  
Old 07-17-2016
Please show your modified script.
# 7  
Old 07-17-2016
join using join command
why not use the join command to join files? The problem is it only can join on 1 field in each file (default the first field in each file). But after the first join it gets much easier.
Code:
$ join -t \| a.tmp b.tmp

7507345|NIP1|0.0.0.2|127369256|17561|Closed|17561|ED|BILL|0
3323077|NIP1|0.0.0.1|142830388|34727|Closed|34727|EF|LAST_BILL_T|0
3323077|NIP4|0.0.0.1|773455302|386196|Closed|34727|EF|LAST_BILL_T|0

After this you only have to keep the lines where field 5 equals field 7, and this is easy with awk. So:
Code:
$ join -t \| a.tmp b.tmp |awk -F\| 'BEGIN {OFS="|"}; $5 == $7 {print $1,$2, $3, $4, $5, $6, $8, $9, $10}'

7507345|NIP1|0.0.0.2|127369256|17561|Closed|ED|BILL|0
3323077|NIP1|0.0.0.1|142830388|34727|Closed|EF|LAST_BILL_T|0

Note: join requires the two files to be sorted on the key fields!
This User Gave Thanks to Ivo Breeden For This Post:
angshuman
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