Re: can I do this: update table while selecting data from table?
| From: | Jochem Maas | Date: | Wed, 14 Jun 2006 21:50:58 +0000 |
| Subject: | Re: can I do this: update table while selecting data from table? | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-238015@lists.php.net to get a copy of this message | ||
afan@afan.net wrote:
> Am I allowde to do this:
>
> $query = mysql_query("SELECT member_id, member_name FROM members");
> while($result = mysql_fetch_array($query))
> {
> if(empty($result['member_name']))
> {
> mysql_query("UPDATE members SET member_name = 'N/A' WHERE member_id =
> ".$result['member_id']."");
> }
> }
>
> As far as I know, after "SELECT" query, data are in buffer and I AM able
> to connect to the same table and do UPDATE, right?
no you'll have to reboot the machine first.
seriously though, have you tried it?
that said your [probably] better off just doing 1 query:
UPDATE members SET member_name = 'N/A' WHERE member_name = '';
that said your [probably] better off leaving the name empty or setting it NULL if
it's unknown and showing 'N/A' in whatever output screen it's relevant for any
names that are found to be empty.
>
> Thanks
>
> -afan
>