How I connect this html form to database?

Question

https://code.sololearn.com/WS6mEMyVCu72/?ref=app

Answer 1

I have used my phone as a database I download bit web server

Answer 2

Depends on the type of database (MySQL, SQL server, ...). You'll want to set up a web server (Apache, IIS,...) that receives the posted data from the form.

Typically, server side code, e.g. PHP, C#, Java,... will be responsible for connecting to the database and checking the entered credentials. Look for ADO/entity framework (C#), JDBC (Java), mysqli (PHP).