Connect multiple datasets to one database entry

Hi, I have user input from a couple of pages, its a 3 step sign-up program where they leave their email first, choose something ( user input/radio buttons ) and then fill in login information for the account. So that’s 3 pages connected to 3 datasets, I would like this to create 1 database entry with infromation from all 3 datasets, instead it creates 3 different database entry and counts as 3 people have signed up to my website. It looks like this

Email is the input from the first page so it creates a database entry, then as I fill input on the other pages it creates another entry. How can I solve these and make all input fill out ONE database entry?


Can you provide a link to your site so we may check further ?