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You're a Genius....

Talk about making things look easy.

Thanks very much

Okay...did a quick and cut down version of what I have using the example I gave earlier:

/usr/xpg4/bin/awk '{
id_arr[$2]++;
id_dat[$2]=$1;

} END {
for ( x in id_arr ) {
printf...

I could post what I've got so far, but the format of the log file is totally different from my example.

What I mean by first and last occurance is the earliest date and the last date an entry was...

What I'm trying to do is, using awk, loading the log file into an array matching column 2, counting the match and finding the first occurance and last occurance of column 1 being it a date.
...