RE: Re: Help With Cursor-Type Statement

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Jack thanks for your reply.

I found the documentation on Cursors, at least as of 5.0 -
http://dev.mysql.com/doc/refman/5.0/en/cursors.html.

Too be fair, I could easily have Googled that before I posted, but I was
hoping that someone would come up with something simpler with a sub-select,
as you did. My MySQL skills just aren't strong enough to do it myself.

Many thanks again, Robert.


-----Original Message-----
From: php-objects@xxxxxxxxxxxxxxx [mailto:php-objects@xxxxxxxxxxxxxxx] On
Behalf Of jacklkemp
Sent: 22 March 2011 06:34
To: php-objects@xxxxxxxxxxxxxxx
Subject:  Re: Help With Cursor-Type Statement


I don't think you need a cursor, you can accomplish this with a JOIN on you
delete thusly:

DELETE T FROM Users AS U 
  INNER JOIN TableX AS T ON T.UserID = U.UserID AND T.GroupID = yyy
    WHERE U.Email = email

OR if you have a table with the Emails you want to delete


DELETE T FROM Users AS U 
  INNER JOIN TableX AS T ON T.UserID = U.UserID AND T.GroupID = yyy
    WHERE U.Email IN (SELECT Email FROM DeleteEmail)

Cursors, last I knew, are not available in MySQL

--- In php-objects@xxxxxxxxxxxxxxx, "Atkinson, Robert" <ratkinson@...> wrote:
>
> I'm trying to write a SQL statement in MySQL which would be achieved using
> Cursors in MS SQL.
> 
> Basically, I have a table containing a list of email addresses. For each
> email address, I want to read the user table (on the email address) to get
> the user ID, then read another table deleting the record where user = xxx
and
> groupid = yyy.
> 
> Is it possible to do looped cursor statements like this in MySQL?
> 
> Thanks, Rob.
> 
> 
> 
>
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http://www.randomhouse.co.uk
http://www.booksattransworld.co.uk http://www.kidsatrandomhouse.co.uk
Generic email address - enquiries@xxxxxxxxxxxxxxxxx

Name & Registered Office:
THE RANDOM HOUSE GROUP LIMITED
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SW1V 2SA
Random House Group Ltd is registered in the United Kingdom with company No. 00954009, VAT number 102838980
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