It sounds like you're asking a question suited for Microsoft Access
(database). However, if you truly do want this for a spreadsheet, then add
Data Validation to the cell(s), specifying "Whole number" for the allowed
type, and 999999999 for the maximum.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.