Finding dates based on start date
I use my database for inventory management. I have a field for purchace date on all of the records. This is a date feild. I know that these item each come with a 3 year warranty. I would like to be able to do a search or run a script that will find all records that are 3 years or more past the purchase date so that I can see what has run out of warranty. Can anyone explain how I would go about this. I would greatly appreciate it.