Create a relationship between two tables in PHP My Admin

Question

I currently have a MySQL databse with two tables, memebers and memberinfo.

I am using the members table for the user sessions and login, the table is as below:

||  ID  ||  USERNAME  ||  PASSWORD  || SALT ||

I then have another table with..

||  ID  ||  USERNAME  || FirstName  || Phone || Ect..

I will be adding lots of random coulmns to the second table and I dont want all of that data to be in the original members table so that it is kept puerly for logging the users in/out.

That being said, I want the tables to link, so that every time a new user is added via the php form, ID and Username are added to the member info table too.

Is this possible just in MySQL or will I have to tweak the PHP.

Thanks

Answer 1

This functionality you describe is only possible by using MySQL's TRIGGER . You could setup a trigger that before the insert on the user table, it inserts into the user_info table. Although, I think most developers would align with using PHP and just insert twice. and use the returned insert_id.

But you will need some kind of a relation between the two tables otherwise this information will get lost in the tables. You would need a user_id column in your user_info table to link those two together. This doesn't HAVE to be a foreign key, but is a good example of when you can use one.