Display counts of certain values in mysql database

I have a small, perfectly working 'php' program, which currently counts the number of occurrences of one specific 'merchant_code' number within a mysql database. It then displays this number and ends the job. I want a small change made to this program so that at 'end of job' time it will cycle through the mysql database an count the occurences of 25 different 'merchant_code' numbers (instead of just one 'merchant_code' number). It will then display the number of occurrences of all 25 of these 'merchant_code' numbers --- and then end the job. This is just a simple looping process is performed at end-of-job time in order to summarize the number of counts of 25 'merchant_code' numbers. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows (all) up to and including Windows XP.