Match values in two files and replace values in specific columns - awk

Question

The purpose is to check if values for column 2 and 3 in file1 match with column 1 in file2. If any value match, then replace values in file2 for column 2 and 3 using the information of file1 columns 4 and 5.
file1
100,31431,37131,999991.70,2334362.30
100,31431,37471,111113.20,2334363.30
100,31433,36769,777775.60,2334361.90
102,31433,36853,333322.00,2334362.80
file2
3143137113 318512.50 2334387.50 100
3143137131 318737.50 2334387.50 100
3143137201 319612.50 2334387.50 100
3143137219 319837.50 2334387.50 100
3143137471 322987.50 2334387.50 100
3143137491 323237.50 2334387.50 100
3143336687 313187.50 2334412.50 100
3143336723 313637.50 2334412.50 100
3143336769 314212.50 2334412.50 100
3143336825 314912.50 2334412.50 100
3143336853 315262.50 2334412.50 102
Output desired
31431,37113,318512.50,2334387.50,100
31431,37131,999991.70,2334362.30,100
31431,37201,319612.50,2334387.50,100
31431,37219,319837.50,2334387.50,100
31431,37471,111113.20,2334363.30,100
31431,37491,323237.50,2334387.50,100
31433,36687,313187.50,2334412.50,100
31433,36723,313637.50,2334412.50,100
31433,36769,777775.60,2334361.90,100
31433,36825,314912.50,2334412.50,100
31433,36853,333322.00,2334362.80,102
I tried
awk -F[, ] 'FNR==NR{a[$1 $2]=$0;next}$1 in a{print $0 ,a[$1 $2]}' file1 file2
Thanks in advance

Answer 1

Could you please try following.
awk '
BEGIN{
OFS=","
}
FNR==NR{
a[$2 $3]=$2 OFS $3
b[$2 $3]=$4;c[$2 $3]=$5
next
}
($1 in a){
$2=b[$1]
$3=c[$1];$1=a[$1]
print
next
}
{
$1=$1
sub(/^...../,"&,",$1)
print
}
' FS="," file1 FS=" " file2
Output will be as follows.
31431,37113,318512.50,2334387.50,100
31431,37131,999991.70,2334362.30,100
31431,37201,319612.50,2334387.50,100
31431,37219,319837.50,2334387.50,100
31431,37471,111113.20,2334363.30,100
31431,37491,323237.50,2334387.50,100
31433,36687,313187.50,2334412.50,100
31433,36723,313637.50,2334412.50,100
31433,36769,777775.60,2334361.90,100
31433,36825,314912.50,2334412.50,100
31433,36853,333322.00,2334362.80,102

Answer 2

Try this:
$ awk -F, 'NR==FNR{tmp=$0;sub($1 FS,"",tmp);a[$2 $3]=tmp;next} $1 in a{print a[$1],$NF;next} {$1=substr($1,1,5) OFS substr($1,6,5);} 1' OFS=, file1 FS=' ' file2
31431,37113,318512.50,2334387.50,100
31431,37131,999991.70,2334362.30,100
31431,37201,319612.50,2334387.50,100
31431,37219,319837.50,2334387.50,100
31431,37471,111113.20,2334363.30,100
31431,37491,323237.50,2334387.50,100
31433,36687,313187.50,2334412.50,100
31433,36723,313637.50,2334412.50,100
31433,36769,777775.60,2334361.90,100
31433,36825,314912.50,2334412.50,100
31433,36853,333322.00,2334362.80,102
Above assumes $1 of file does not include regex characters, so to be accurate and safe, better use this:
awk -F, 'NR==FNR{$1="";a[$2 $3]=substr($0,2);next} $1 in a{print a[$1],$NF;next} {$1=substr($1,1,5) OFS substr($1,6,5);} 1' OFS=, file1 FS=' ' file2
However this one assumes the FS of file1 is 1 character only.
And that leads to another change/efficiency improvement:
awk -F, 'NR==FNR{a[$2 $3]=substr($0,length($1 FS)+1);next} $1 in a{print a[$1],$NF;next} {$1=substr($1,1,5) OFS substr($1,6,5);} 1' OFS=, file1 FS=' ' file2