Question

I’m building a web application in work and I have a form where users can register certain types of information.

Username   |   Password   |   Company

Now I’m unsure how to approach this. What I want is when the user submits that registration form Username, password and company get written to one data table(user) BUT because Company, in the user data table, is a foreign key reference I need Company to be written to a separate datatable(company) as a Primary Key (and of course username to be written as a FK reference as its a 1 – 1 relationship).

I’m not looking for a coded solution from you guys because I know my PHP and MYSQL I’m just looking for some pseudo code algorithms to get the creative juices flowing!

EDIT: I AM USING POSTGRESQL not MYSQL but I’m pretty sure there’s little difference except port numbers and small syntax changes

Answer 1

assume first column is id:

1. Save Company $mysqli->query("INSERT INTO company VALUES (NULL, '$company_name')";
2. Get id of this item. $company_id = $mysqli->insert_id;
3. Save User with this id $mysqli->query("INSERT INTO user VALUES (NULL, '$username', '$password', '$company_id')";
4. Get user’s id $user_id = $mysqli->insert_id;
5. Update the company with it: $mysqli->query("UPDATE company SET user_id = $user_id WHERE company_id = $company_id)";