I have an inputfile that I trying to awk with a getline(Solaris v8 ksh). However I need to have the results be a unique. Is there a comparable command within awk to return a unique result? Or can you break out of the awk to add a uniq. I am looking for something more complex then a pipe command(which I can get to work but would like to embed everything in an awk then a script that has an awk command.). Any help would be great, and I appreciate any ideas anyone has.

amharm00:1004042:Harmet,Andrew M:10006058:10006024:
amharm00:1004042:Harmet,Andrew M:10006058:10006025:
amharm00:1004042:Harmet,Andrew M:10006058:10006026:
amharm00:1004042:Harmet,Andrew M:10006058:10006027:
axgiai00:1033315:Giaimo,Anthony:10003385:10003372:
axgiai00:1033315:Giaimo,Anthony:10003385:10003373:
axgiai00:1033315:Giaimo,Anthony:10003385:20000298:
bjkugl00:1002500:Kugler,Bill J:10006706:10006695:
bjkugl00:1002500:Kugler,Bill J:10006706:10006696:
wbcroo00:1002216:Crook,Wallace B:10007122:10007104:
wbcroo00:1002216:Crook,Wallace B:10007122:10007105:

what is the desired output given this sample input?
why do you need 'getline'?
do you have ONE or TWO files to process/match?

Sorry, I am taking the input and extracting $1, $2, $3, and $5. Using this information to create an output file that will add user data for generation into a mysql database.
I have been tasked to bring the limping version of the script into a production environment. It is a disaster, about 250 lines of code, 8 loops mixed with if conditions, and about 30 separate awk statements all piped with about 4 or 5 commands each. I have a light bulb idea of a better way to do it, but am still pretty new.

I still don't understand the desired output, but......

nawk -F':' -v OFS=':' '{print $1, $2, $3, $5}' inputFile.txt

If I awk it I will have $1 entered four times. What I am looking for is a way for within an awk script to have it return only one instance of $1. I was thinking a getline and then an if statement with a condition of $1 == $previous1 or something. But I am still working on the details.

so... for the case of $1="amharm00", what record would you like to return? There're FOUR of them.