I'm having trouble working through a data problem. Any tips or keywords that might clue me into a known pattern would be incredibly appreciated!
I have about 500,000 users in my system. Each user has a points balance, updated by a system over which I have no control. I'd like to track changes to each user's point balance over time by taking timestamped snapshots of their balance, and saving it into a new table. It's easy to take the snapshot: insert into balances (userid, points) select userid, points from users; This quickly takes the points field from my users table, and saves it into a balances table, which saves the data along with a timestamp. I can run that query on a regular basis without overly taxing my system. The first time its run, I get 500,000 rows of data. That's fine. But the next time I run a query, I only want to save the differences in balance. Anyone have any tips? Best, Jason -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
