First VDO tutorial Code doesn’t work, I think it is missing on Click Submit button function.
Can someone please teach how to update database?
Most tutorials online no one is give code that work.
After a week of trying to make my custom forms that collecting data from different pages.
I still haven’t found the code that work. I think I should go back to learn Laravel 6 and build my own site, I thought Wix was the right choice.
Depending on your needs you can use an insert() or update() function inside an onClick function for your Submit button. You can find more information about it here:
https://www.wix.com/corvid/reference/wix-data.html#insert
https://www.wix.com/corvid/reference/wix-data.html#update
Information that is be submitted should be taken from your form input values:
https://www.wix.com/corvid/reference/$w.TextInput.html#value
Thank you Angelina, I tried the link you gave me still can’t get to work. Anyway I will buy a Udeme tutorial. I don’t want to waste my time anymore. 
@katetester See the Basic Form Example and learn by doing.