i have to fill a daily activity chart in the user area and submit it, after submiting the form the admin shud be able to make changes to the daily activity chart and resend it to the user, and the user shud be able to see the changes up to date.

Now i m confused on how to do this, by using database or sending it to the mail. {there will be more than one users}
please give me sugestions

Data should be stored in the database.

Inform user if admin makes any changes in database. Send changes via email to user.