数据库设计问题...预订应用程序

Question

I have 4 tables,one is credentials(it holds an id, email and password), the other 2 are for business users and regular users of the app. The business users table holds crID(foreign key)name,lastname,address etc... The regular users table holds crID(foreign key),name,lastname etc...

The 4th is the booking table, it holds a bookingID, bookedfrom,bookedfor(the last 2 being foreign keys that point to the credentials table).

If a regular user registers in the site he closes a bookingslot and that is stored in the booking table, his name,last name are stored in the regular users table and his credentials in the credentials table.

The business user table just holds the business user for which a booking is made by the regular users.

Here is a graph: db image

The question is what to do if a regular user does not choose the web to make the booking but makes a call. The business users are given the option to make the booking "manually" also. I am just having difficulty how to integrate that in the db.

As I see it I need to make the following:

1. Create a booking slot in the bookings table
2. Create a new regular user entry in the regular users table and at the same time create another column that would indicate if the user is registered or not.
3. create an entry in the credentials table but without password/email since this he will not be a registered user...he just made a booking using the phone.

WHat is your opinion.If you want I will post some show create statements. I think I made my point.

Answer 1

I would personally merge business users , normal users and optionally credentials in one single users table.

Since I don't see the need of two seperate tables for your users, it would simplify drastically your data model. You just need a flag to determine if the user is a business user or a normal user.

For the rest, I think that having a null password is enough to determine if the user hasn't registered yet.