HTML pages are static pages meaning they dont have any sort of database connection on the server. There are certain languages likve PHP, Classic ASP, ASP.net where we write server side code that does job og connecting to database and getting/inserting data from/to database.
In general keeping your page connected to server all the time is not a good practice, and which may make your server slow and other process overheads.
let us know if you need more information.
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