Hi Swapna_l9 and welcome to the forum,
You'll want to use a rule with multiple actoins. One action submits to the database and another to e-mail or a SharePoint form library. Submitting to a SharePoint list is not support out-of-the-box. We have a tool that does it, but a Form Library is easy to set up and that doesn't require anything special. If you need a SharePoint list (and not a SharePoint form library), we can show you our tool. Hopefully, you can just use a SharePoint form library in addition to your database. Best of luck!
Patrick