Merge two files using awk and write the output - bash

Question

I have two files with common field. I want to merge the two files with common field and write the merged file into another file using awk in linux command.
file1
412234$name1$value1$mark1
413233$raja$$mark2
414444$$$
file2
412234$sum$file2$address$street
413233$sum2$file32$address2$street2$path
414444$$$$
These sample files are seperated by $ and output merged file also will be in $. Also these rows have the empty field.
I tried the script using join:
join -t "$" out2.csv out1.csv |sort -un > file3.csv
But there is total number mismatching happened.
Tried with awk:
myawk.awk
#!/usr/bin/awk -f
NR==FNR{a[FNR]=$0;next} {print a[FNR],$2,$3}
I ran it
awk -f myawk.awk out2.csv out1.csv > file3.csv
It was also taking too much time. Not responding.
Here out2.csv is master file and we have to compare with out1.csv
Could you please help me to write the merged files into another file?

Answer 1

Run the following using bash. This gives you the equivalent of a full outer join
join -t'$' -a 1 -a 2 <(sort -k1,1 -t'$' out1.csv ) <(sort -k1,1 -t'$' out2.csv )

Answer 2

You were in the good direction with the awk solution. The main point was to change FS to split fields with $:
Content of script.awk:
awk '
BEGIN {
## Split fields with "$".
FS = "$"
}
## Save lines from second file, the first field as the index of the
## array, and rest of the line as the value.
FNR == NR {
file2[ $1 ] = substr( $0, index( $0, "$" ) )
next
}
## Print when keys from both files match.
FNR < NR {
if ( $1 in file2 ) {
printf "%s$%s\n", $0, file2[ $1 ]
}
}
' out2.csv out1.csv
Output:
412234$name1$value1$mark1$$sum$file2$address$street
413233$raja$$mark2$$sum2$file32$address2$street2$path
414444$$$$$$$$