Need php program to count matching records in mysql

General information for the business: We operate websites
Kind of development: New program from scratch
Num. of modules: 1
Description of requirements/functionality: I have a mysql database with two columns, first column is individual names, second column contains hundreds of names separated by commas. The database has thousands of rows

I need to populate a third column with the total number of appearances of the first column name in the second column array of names in any row

Here is simple example
Count Calculated
joe | jim, nancy, mary, peter | 2
peter | joe, nancy, mary | 1
mary | nancy, jim, joe, susie | 3
danny | mary, nick, john | 0

I normally do this with a spreadsheet countif statement but the file is too large now
CMS and Admin requirements: I just need to be able to execute a php script via command line specifying the database to process

For example if the php script is process.php
I will issue a command something like "php process.php database_name" and let it run

The processing should continue running after I close ssh connection
Processing should restart automatically if the server is rebooted, can use a cron to trigger, the app just needs to be smart enough to pick up where processing was stopped
Specific technologies required: php
OS requirements: Linux
Extra notes: