Question

I have created a web form with the following values

• first name
• last name
• address line 1
• address line 2
• city
• state
• contact1
• contact2
• email id
• password
• confirm password…

Upon clicking the submit button, a stored procedure savedata is invoked.

The fields name, address and contacts are saved into table personal_details, while email and password are stored into login_detail.

The table personal_details has columns user_id int identity(1,1) pk…
Same user_id int identity(1,1) fk is defined in login_detail table…

Now, is it possible that 2 users 1 and 2 submit the form at the same time and user1’s personal details get pushed in table and then user2’s personal details get pushed.

Generating id as 1 and 2 respectively…

but for login details user2 data get pushed first then user1…generating ids 1 and 2… which are wrong….

Is there any other method to get the same ids for both the tables?

thanks

And this is my first question…sorry if I am not able to frame it properly…

Answer 1

You should perform the following sequence of steps in a single transaction to ensure the atomicity of this save operation:

1. BEGIN TRANSACTION
2. Insert record into the personal_details table.
3. Obtain the user_id corresponding to this new record added.
4. Insert record into the login_details table with the user_id as the one obtained in the previous step.
5. COMMIT TRANSACTION.

Also, it doesn’t seem appropriate to “vertically partition” the details of a user across two tables when there is a one-to-one correspondence between records in these two tables. You could just have a single table unless there are attributes of a user that carry multiple values for a single user id i.e. one-to-many relationship.