Why would you want to re-use the deleted ID?
That would be a poor design.
When you insert a new record with an autoinvcrement, last_insert_id()
will tell you what it
is so you can insert it in dependent tables.
Fates wrote:
>
> I am trying to understand references in tables and using primary keys with
> auto increment option as a reference to all tables:
>
> What is the best way to reference other tables? I have three tables:
> menus, categories, and links. I also have an ID field in each table that
> uses the autoincrement option and is the primary key which is used to
> reference the other tables. This works great for referencing except when
> a record is deleted. When a record is deleted and you add another record
> the ID is not assigned the deleted records ID instead it skips the deleted
> record ID and uses the next ID when you would expect it to use the deleted
> ID which then causes problems with query to display all records from all
> tables. Maybe if I could use REPLACE to replace the deleted record that
> might work.
>
> I guess the solution is to create a new field common to all tables called
> record_id and not use the auto increment option and enter the record ID
> manually for each record I add. The problem with this is I have to
> remember what the previous record was if I want it to be in order. Is
> there a better way to do this. I like the auto increment option.
>
> I saw an example where three tables all contain a customerid which links
> all the tables together. Lets say I delete a customerid in one table but
> not the others. Does the database automatically delete the other
> cutomerids in the other tables that correspond to the customerid that was
> deleted or is it up to the programmer to delete the other two id's.
>
> --
> This email was sent using w3mail.
>
> ---------------------------------------------------------------------
> Before posting, please check:
> http://www.mysql.com/manual.php (the manual)
> http://lists.mysql.com/ (the list archive)
>
> To request this thread, e-mail <[EMAIL PROTECTED]>
> To unsubscribe, e-mail
><[EMAIL PROTECTED]>
> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
---------------------------------------------------------------------
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
http://lists.mysql.com/ (the list archive)
To request this thread, e-mail <[EMAIL PROTECTED]>
To unsubscribe, e-mail <[EMAIL PROTECTED]>
Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
