How to compare two csv files by columns?

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# 1  
Old 05-01-2020
How to compare two csv files by columns?

I have two csv files file1 and file2. I want to compare both csv's by applying condition.
col2, col4 of file1 are equal to col2, col4 of file2 but difference in col6 of file1 and file2
eg: if col2 & col4 of file1 = col2 & col4 of file2 and col6 in file1 != col6 in file2 then get the output based on the condition.

I tried awk but it is not giving me the desired results. I searched a lot on internet and forums but I am out of searches now.
My awk code is

awk 'NR==FNR{a[$2$4]=$2$4;next}{if ($2$4 in a && a[$6] != $6)print;}' FS="," file1.csv file2.csv

Getting out put only for [$2$4]=$2$4 condition its not considering [$6] != $6 condtion.
There is something wrong in my script. Please help me

Please help me to resolve this issue. Also let me know if we can resolve this using Python
# 2  
Old 05-01-2020
Adapting your own attempt, try
awk 'NR==FNR {a[$2 $4] = $6; next}  a[$2 $4] != $6' FS="," file1 file2

Last edited by RudiC; 05-01-2020 at 04:08 PM..
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