UNIX for Dummies Questions & Answers

1,"This is field 2",3,4,5
2,"This is field 2 it can contain one , comma",3,4,5
3,"This is field 2 it also, can, contain, more",3,4,5
4,"This is field 2 without extra commas",3,4,5

            awk -F, ' {
                if ( $3 == "3" ) {
                    print $0
                }
            } ' file

1,"This is field 2",3,4,5
4,"This is field 2 without extra commas",3,4,5

awk -F'"' '{
   line="";
   for (i=1; i<=NF; i++) {
      if (i != 2) line=line $i;
   }

   split(line, v, ",")
   if (v[3] == "3") {
      print;
   }
} ' file