Using a tool to generate a data model I go the following statement:
Create table StateN (
StateId Int NOT NULL AUTO_INCREMENT,
StateNm Char(50) NOT NULL DEFAULT '',
StateCd Char(7) NOT NULL DEFAULT '',
SortInt Int NOT NULL DEFAULT 0,
UNIQUE (StateId),
UNIQUE (StateCd),
Primary Key (StateId),
UNIQUE Index ak_State (StateCd)
) TYPE = InnoDB
ROW_FORMAT = Default;
The last four statements seem to be redundant in that the
UNIQUE(StateId) is a proper subset of the Primary Key(StateId) statement
and is StateCd to its index.
My question is, what is happening in terms of the objects I am creating?
That is: Am I creating for indexes or two? Are they the pk and ak that
I want (last two statements) or is the server only creating the first
two?
Any insight here is greatly appreciated!
Best Regards,
Boyd E. Hemphill
[EMAIL PROTECTED]
Triand, Inc.
Life is not a journey to the grave arriving safely in a well preserved
body, but rather a skid in broadside, thoroughly used, totally worn, and
loudly proclaiming: "WOW! What a ride!"
-----Original Message-----
From: Victoria Reznichenko [mailto:[EMAIL PROTECTED]
Sent: Monday, March 15, 2004 6:24 AM
To: [EMAIL PROTECTED]
Subject: Re: Getting Identity after INSERT
Alex Curvers <[EMAIL PROTECTED]> wrote:
>
> Whats the preferred syntax to insert values in multiple (related)
tables
> I insert one record, then i need the ID of the inserted value to add
it
> the with the other inserts
>
> with MSSQL stored procs its
>
> INSERT INTO .....................................
> SELECT @MyID = @@IDENTITY
>
> after that you can use @MyID
>
> So whats the preferred method with MySQL, is there a easy way to get
the
> Identity back from a just inserted record, or do i just have to do a
> select based on a value i did just insert ?
>
Use AUTO_INCREMENT column and LAST_INSERT_ID() function to retrieve most
recent auto_increment value:
http://www.mysql.com/doc/en/example-AUTO_INCREMENT.html
http://www.mysql.com/doc/en/Information_functions.html
--
For technical support contracts, goto
https://order.mysql.com/?ref=ensita
This email is sponsored by Ensita.net http://www.ensita.net/
__ ___ ___ ____ __
/ |/ /_ __/ __/ __ \/ / Victoria Reznichenko
/ /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED]
/_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net
<___/ www.mysql.com
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:
http://lists.mysql.com/[EMAIL PROTECTED]
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
