First,we need to create a unsorted record 20 fields and read the unsorted file with any pairs from the created record.
Second, we need to sort the file based on zip code.
Third, we have to perform any simple search.
17 freelancers are bidding on average $34 for this job
I can write Java console application which could implement 3 mentioned tasks. I can write PHP console script (or web page with PHP) which could implement 3 mentioned tasks. Choose what is better for your needs.