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Any way to get join to include the non-matching line ???


 
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# 1  
Any way to get join to include the non-matching line ???

Hi,


Need guidance if I should totally abandon join and use something else instead. I found several other options when searching for merge files in UNIX.com


Below are the test files to join:



Code:
$ head -1000 a.txt b.txt c.txt
==> a.txt <==
A|1
B|3
C|5
D|10
E|11

==> b.txt <==
A|4
B|5
C|4
D|1

==> c.txt <==
A|1
A|3
C|5
D|10
E|11

Running
Code:
$ join -t"|" -j1 a.txt b.txt

gives



Code:
A|1|4
B|3|5
C|5|4
D|10|1

Is there no way to get the E row from a.txt

Running
Code:
$ join -t"|" -j1 a.txt c.txt

. Is there no way to get the B row from a.txt printed?



Code:
A|1|1
A|1|3
C|5|5
D|10|10
E|11|11

# 2  
Hi
Code:
join -t'|' -a1 a.txt b.txt
join -t'|' -a1 a.txt c.txt

# 3  
Code:
join -t"|" -j 1 -a 1 -a 2 a.txt c.txt


Last edited by rdrtx1; 02-27-2020 at 07:55 PM..

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