RE: [PHP-DB] adding integer to field in query

[Matt Schroebel]

Dillon, John   wrote on Wednesday, August
13, 2003 10:24 AM:

> How do you add a number to a field within the query, ie
> without having to
> extract?  Eg
> 
> $query="UPDATE Choice SET visits=(visits+1) WHERE ID='$thisID'";
> 
> is the above "visits=(visits+1)" legal, cos it doesn't work
> at the moment?
> 

It's executing right?  Echo out your query statement and see what you're
asking for.

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Re: [PHP-DB] adding integer to field in query

[Ignatius Reilly]

Your SQL looks legal (at least for MySQL). Probably a PHP error then.
Do a die( $query )  to see if the query is well-formed and $thisID correctly
interpolated.

Personnally I would rather write:
$query="
UPDATE Choice
SET visits = visits + 1
WHERE ID = {$thisID}
; "
[if ID is of numeric type]

HTH
Ignatius
_
- Original Message -
From: "Dillon, John" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, August 13, 2003 4:23 PM
Subject: [PHP-DB] adding integer to field in query


How do you add a number to a field within the query, ie without having to
extract?  Eg

$query="UPDATE Choice SET visits=(visits+1) WHERE ID='$thisID'";

is the above "visits=(visits+1)" legal, cos it doesn't work at the moment?

Thanks,

John
























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Re: [PHP-DB] adding integer to field in query

[CPT John W. Holmes]

From: "Dillon, John" <[EMAIL PROTECTED]>
> Thanks to both responses.  In fact, it decided to work once I put 0 in the
> cell that 1 was to be added to!  It seems it got it started..  1+NULL=?

1 + NULL = NULL

Any math statement with NULLs in it will equal NULL. (DB wise)

---John Holmes...


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RE: [PHP-DB] adding integer to field in query

[Dillon, John]

Thanks to both responses.  In fact, it decided to work once I put 0 in the
cell that 1 was to be added to!  It seems it got it started..  1+NULL=?

-Original Message-
From: Matt Schroebel [mailto:[EMAIL PROTECTED]
Sent: 13 August 2003 15:48
To: Dillon, John; [EMAIL PROTECTED]
Subject: RE: [PHP-DB] adding integer to field in query


Dillon, John <mailto:[EMAIL PROTECTED]>  wrote on Wednesday, August
13, 2003 10:24 AM:

> How do you add a number to a field within the query, ie
> without having to
> extract?  Eg
> 
> $query="UPDATE Choice SET visits=(visits+1) WHERE ID='$thisID'";
> 
> is the above "visits=(visits+1)" legal, cos it doesn't work
> at the moment?
> 

It's executing right?  Echo out your query statement and see what you're
asking for.


   http://www.cantor.com
CONFIDENTIAL: This e-mail, including its contents and attachments, if any, are 
confidential. If you are not the named recipient please notify the sender and 
immediately delete it. You may not disseminate, distribute, or forward this e-mail 
message or disclose its contents to anybody else. Copyright and any other intellectual 
property rights in its contents are the sole property of Cantor Fitzgerald.
 E-mail transmission cannot be guaranteed to be secure or error-free. The sender 
therefore does not accept liability for any errors or omissions in the contents of 
this message which arise as a result of e-mail transmission.  If verification is 
required please request a hard-copy version.
 Although we routinely screen for viruses, addressees should check this e-mail and 
any attachments for viruses. We make no representation or warranty as to the absence 
of viruses in this e-mail or any attachments. Please note that to ensure regulatory 
compliance and for the protection of our customers and business, we may monitor and 
read e-mails sent to and from our server(s). 

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Legal Statement at http://www.cantor.com/legal_information.html


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