Jerry Schwartz wrote:
>> Being rather new to all this, I understood from the MySql manual that
>> the auto_increment is to b e used immediately after an insertion not
>> intermittently. My application is for administrators (the site owner &
>> designates) to update the database from and administration directory,
>> accessed by user/password login... so there's really very little
>> possibility of 2 people accessing at the same time.
>> By using MAX + 1 I keep the id number in the $idIn and can reuse it in
>> other INSERTS
>>
> [JS] Are you looking for something like LAST_INSERT_ID()? If you INSERT a
> record that has an auto-increment field, you can retrieve the value
> that got
> inserted with "SELECT LAST_INSERT_ID()". It is connection-specific, so
> you'll always have your "own" value. You can then save it to reuse, either
> as a session variable or (more easily) as a hidden field on your form.
>
Thanks, Jerry,
You hit the nail on the head.:)
To refine my problem (and reduce my ignorance),here's what is happening
on the form page:
There is a series of INSERTs. The first inserts all the columns of
"book" table except for the id, which I do not specify as it if auto-insert.
In subsequent tables I have to reference the book.id (for transitional
tables like "book_author"(refers authors to book) etc.
If I understand it correctly, I must retrieve ("SELECT
LAST_INSERT_ID()") after the first INSERT and before the following
insert; and save the id as a string ($id)...e.g. $sql = "SELECT
LAST_INSERT_ID() AS $id"
I need clarification on the "AS $id" - should this be simply id(does
this have to be turned into a value into $id or does $id contain the
value? And how do I retrieve it to use the returned value for the next
$sql = "INSERT ... - in other words, is the id or $id available for the
next directive or do I have to do something like $id = id?
I'm trying to figure this out with some trials but my insert does not
work from a php file - but it works from command-line... that's another
post.
--
Phil Jourdan --- pj@xxxxxxxxxxxxx
http://www.ptahhotep.com
http://www.chiccantine.com
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